js-apis-call.md

# @ohos.telephony.call (Call)

The **call** module provides call management functions, including making calls, redirecting to the dial screen, obtaining the call status, and formatting phone numbers.

To subscribe to the call status, use [`observer.on('callStateChange')`](js-apis-observer.md#observeroncallstatechange).

>**NOTE**
>
>The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.

## Modules to Import

```js
import call from '@ohos.telephony.call';
```

## call.dial<sup>(deprecated)</sup>

dial\(phoneNumber: string, callback: AsyncCallback<boolean\>\): void

Initiates a call. This API uses an asynchronous callback to return the result.

**Required Permissions**: ohos.permission.PLACE_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                        | Mandatory| Description                                   |
| ----------- | ---------------------------- | ---- | --------------------------------------- |
| phoneNumber | string                       | Yes  | Phone number.                             |
| callback    | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result.<br>- **true**: success<br>- **false**: failure|

**Example**

```js
call.dial("138xxxxxxxx", (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.dial<sup>(deprecated)</sup>

dial\(phoneNumber: string, options: DialOptions, callback: AsyncCallback<boolean\>\): void

Initiates a call. You can set call options as needed. This API uses an asynchronous callback to return the result.

**Required Permissions**: ohos.permission.PLACE_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                        | Mandatory| Description                                   |
| ----------- | ---------------------------- | ---- | --------------------------------------- |
| phoneNumber | string                       | Yes  | Phone number.                             |
| options     | [DialOptions](#dialoptions)  | Yes  | Call option, which indicates whether the call is a voice call or video call. |
| callback    | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result.<br>- **true**: success<br>- **false**: failure|

**Example**

```js
call.dial("138xxxxxxxx", {
    extras: false
}, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.dial<sup>(deprecated)</sup>

dial\(phoneNumber: string, options?: DialOptions\): Promise<boolean\>

Initiates a call. You can set call options as needed. This API uses a promise to return the result.

**Required Permissions**: ohos.permission.PLACE_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                       | Mandatory| Description                                  |
| ----------- | --------------------------- | ---- | -------------------------------------- |
| phoneNumber | string                      | Yes  | Phone number.                            |
| options     | [DialOptions](#dialoptions) | No  | Call option, which indicates whether the call is a voice call or video call.|

**Return value**

| Type                  | Description                                                        |
| ---------------------- | ------------------------------------------------------------ |
| Promise&lt;boolean&gt; | Promise used to return the result.<br>- **true**: success<br>- **false**: failure|

**Example**

```js
let promise = call.dial("138xxxxxxxx", {
    extras: false
});
promise.then(data => {
    console.log(`dial success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`dial fail, promise: err->${JSON.stringify(err)}`);
});
```


## call.dialCall<sup>9+</sup>

dialCall\(phoneNumber: string, callback: AsyncCallback<void\>\): void

Initiates a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required Permissions**: ohos.permission.PLACE_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                        | Mandatory| Description                                   |
| ----------- | ---------------------------- | ---- | --------------------------------------- |
| phoneNumber | string                       | Yes  | Phone number.                             |
| callback    | AsyncCallback&lt;void&gt;    | Yes  | Callback used to return the result.                             |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.dialCall("138xxxxxxxx", (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.dialCall<sup>9+</sup>

dialCall\(phoneNumber: string, options: DialCallOptions, callback: AsyncCallback<void\>\): void

Initiates a call. You can set call options as needed. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required Permissions**: ohos.permission.PLACE_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     |                    Type            | Mandatory| Description                                |
| ----------- | ----------------------------------- | ---- | ------------------------------------ |
| phoneNumber | string                              | Yes  | Phone number.                          |
| options     | [DialCallOptions](#dialcalloptions9)| Yes  | Call options, which carry other configuration information of the call.   |
| callback    | AsyncCallback&lt;void&gt;           | Yes  | Callback used to return the result.                          |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.dialCall("138xxxxxxxx", {
    accountId: 0,
    videoState: 0,
    dialScene: 0,
    dialType: 0,
}, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.dialCall<sup>9+</sup>

dialCall\(phoneNumber: string, options?: DialCallOptions\): Promise<void\>

Initiates a call. You can set call options as needed. This API uses a promise to return the result.

**System API**: This is a system API.

**Required Permissions**: ohos.permission.PLACE_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     |                 Type               | Mandatory|                Description                   |
| ----------- | ----------------------------------- | ---- | -------------------------------------- |
| phoneNumber | string                              | Yes  | Phone number.                            |
| options     | [DialCallOptions](#dialcalloptions9)| No  | Call option, which indicates whether the call is a voice call or video call.|

**Return value**

| Type                  | Description                                                        |
| ---------------------- | ------------------------------------------------------------ |
| Promise&lt;void&gt;    | Promise used to return the result.                            |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
try {
    call.dialCall('138xxxxxxxx');
    console.log(`dialCall success, promise: data->${JSON.stringify(data)}`);
} catch (error) {
    console.log(`dialCall fail, promise: err->${JSON.stringify(error)}`);
}
```


## call.makeCall<sup>7+</sup>

makeCall(phoneNumber: string, callback: AsyncCallback\<void\>): void

Launches the call screen and displays the dialed number. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.Applications.Contacts

**Parameters**

| Name     | Type                     | Mandatory| Description                                      |
| ----------- | ------------------------- | ---- | ------------------------------------------ |
| phoneNumber | string                    | Yes  | Phone number.                                |
| callback    | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.makeCall("138xxxxxxxx", err => {
    console.log(`makeCall callback: err->${JSON.stringify(err)}`);
});
```


## call.makeCall<sup>7+</sup>

makeCall(phoneNumber: string): Promise\<void\>

Launches the call screen and displays the dialed number. This API uses a promise to return the result.

**System capability**: SystemCapability.Applications.Contacts

**Parameters**

| Name     | Type  | Mandatory| Description      |
| ----------- | ------ | ---- | ---------- |
| phoneNumber | string | Yes  | Phone number.|

**Return value**

| Type               | Description                             |
| ------------------- | --------------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.makeCall("138xxxxxxxx");
promise.then(() => {
    console.log(`makeCall success`);
}).catch(err => {
    console.error(`makeCall fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.hasCall

hasCall\(callback: AsyncCallback<boolean\>\): void

Checks whether a call is in progress. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                        | Mandatory| Description                                                        |
| -------- | ---------------------------- | ---- | ------------------------------------------------------------ |
| callback | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result. Callback used to return the result.<br>- **true**: A call is in progress.<br>- **false**: No call is in progress.|

**Example**

```js
call.hasCall((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.hasCall

hasCall\(\): Promise<boolean\>

Checks whether a call is in progress. This API uses a promise to return the result.

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type                  | Description                                   |
| ---------------------- | --------------------------------------- |
| Promise&lt;boolean&gt; | Promise used to return the result.|

**Example**

```js
let promise = call.hasCall();
promise.then(data => {
    console.log(`hasCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`hasCall fail, promise: err->${JSON.stringify(err)}`);
});
```


## call.getCallState

getCallState\(callback: AsyncCallback<CallState\>\): void

Obtains the call status. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                        | Mandatory| Description                                |
| -------- | -------------------------------------------- | ---- | ------------------------------------ |
| callback | AsyncCallback&lt;[CallState](#callstate)&gt; | Yes  | Callback used to return the result.|

**Example**

```js
call.getCallState((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.getCallState

getCallState\(\): Promise<CallState\>

Obtains the call status. This API uses a promise to return the result.

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type                                  | Description                                   |
| -------------------------------------- | --------------------------------------- |
| Promise&lt;[CallState](#callstate)&gt; | Promise used to return the result.|

**Example**

```js
let promise = call.getCallState();
promise.then(data => {
    console.log(`getCallState success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`getCallState fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.hasVoiceCapability<sup>7+</sup>

hasVoiceCapability(): boolean

Checks whether a device supports voice calls.

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type   | Description                                                        |
| ------- | ------------------------------------------------------------ |
| boolean | - **true**: The device supports voice calls.<br>- **false**: The device does not support voice calls.|

```js
let result = call.hasVoiceCapability(); 
console.log(`hasVoiceCapability: ${JSON.stringify(result)}`);
```

## call.isEmergencyPhoneNumber<sup>7+</sup>

isEmergencyPhoneNumber\(phoneNumber: string, callback: AsyncCallback<boolean\>\): void

Checks whether the called number is an emergency number. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                        | Mandatory| Description                                                        |
| ----------- | ---------------------------- | ---- | ------------------------------------------------------------ |
| phoneNumber | string                       | Yes  | Phone number.                                                  |
| callback    | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result. - **true**: The called number is an emergency number.<br>- **false**: The called number is not an emergency number.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.isEmergencyPhoneNumber("138xxxxxxxx", (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.isEmergencyPhoneNumber<sup>7+</sup>

isEmergencyPhoneNumber\(phoneNumber: string, options: EmergencyNumberOptions, callback: AsyncCallback<boolean\>\): void

Checks whether the called number is an emergency number based on the phone number. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                                              | Mandatory| Description                                                        |
| ----------- | -------------------------------------------------- | ---- | ------------------------------------------------------------ |
| phoneNumber | string                                             | Yes  | Phone number.                                                  |
| options     | [EmergencyNumberOptions](#emergencynumberoptions7) | Yes  | Phone number.                                              |
| callback    | AsyncCallback&lt;boolean&gt;                       | Yes  | Callback used to return the result. - **true**: The called number is an emergency number.<br>- **false**: The called number is not an emergency number.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.isEmergencyPhoneNumber("112", {slotId: 1}, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.isEmergencyPhoneNumber<sup>7+</sup>

isEmergencyPhoneNumber\(phoneNumber: string, options?: EmergencyNumberOptions\): Promise<boolean\>

Checks whether the called number is an emergency number based on the phone number. This API uses a promise to return the result.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                                              | Mandatory| Description          |
| ----------- | -------------------------------------------------- | ---- | -------------- |
| phoneNumber | string                                             | Yes  | Phone number.    |
| options     | [EmergencyNumberOptions](#emergencynumberoptions7) | No  | Phone number.|

**Return value**

| Type                  | Description                                               |
| ---------------------- | --------------------------------------------------- |
| Promise&lt;boolean&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.isEmergencyPhoneNumber("138xxxxxxxx", {slotId: 1});
promise.then(data => {
    console.log(`isEmergencyPhoneNumber success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`isEmergencyPhoneNumber fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.formatPhoneNumber<sup>7+</sup>

formatPhoneNumber\(phoneNumber: string, callback: AsyncCallback<string\>\): void

Formats a phone number. This API uses an asynchronous callback to return the result.

A formatted phone number is a standard numeric string, for example, 555 0100.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                       | Mandatory| Description                                |
| ----------- | --------------------------- | ---- | ------------------------------------ |
| phoneNumber | string                      | Yes  | Phone number.                          |
| callback    | AsyncCallback&lt;string&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.formatPhoneNumber("138xxxxxxxx", (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```

## call.formatPhoneNumber<sup>7+</sup>

formatPhoneNumber\(phoneNumber: string, options: NumberFormatOptions, callback: AsyncCallback<string\>\): void

Formats a phone number based on specified formatting options. This API uses an asynchronous callback to return the result.

A formatted phone number is a standard numeric string, for example, 555 0100.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                                        | Mandatory| Description                                |
| ----------- | -------------------------------------------- | ---- | ------------------------------------ |
| phoneNumber | string                                       | Yes  | Phone number.                          |
| options     | [NumberFormatOptions](#numberformatoptions7) | Yes  | Number formatting options, for example, country code.              |
| callback    | AsyncCallback&lt;string&gt;                  | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.formatPhoneNumber("138xxxxxxxx", {
    countryCode: "CN"
}, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.formatPhoneNumber<sup>7+</sup>

formatPhoneNumber\(phoneNumber: string, options?: NumberFormatOptions\): Promise<string\>

Formats a phone number based on specified formatting options. This API uses a promise to return the result.

A formatted phone number is a standard numeric string, for example, 555 0100.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                                        | Mandatory| Description                  |
| ----------- | -------------------------------------------- | ---- | ---------------------- |
| phoneNumber | string                                       | Yes  | Phone number.            |
| options     | [NumberFormatOptions](#numberformatoptions7) | No  | Number formatting options, for example, country code.|

**Return value**

| Type                 | Description                                       |
| --------------------- | ------------------------------------------- |
| Promise&lt;string&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.formatPhoneNumber("138xxxxxxxx", {
    countryCode: "CN"
});
promise.then(data => {
    console.log(`formatPhoneNumber success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`formatPhoneNumber fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.formatPhoneNumberToE164<sup>7+</sup>

formatPhoneNumberToE164\(phoneNumber: string, countryCode: string, callback: AsyncCallback<string\>\): void

Converts a phone number into the E.164 format. This API uses an asynchronous callback to return the result.

The phone number must match the specified country code. For example, for a China phone number, the country code must be **CN**. Otherwise, **null** will be returned.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                       | Mandatory| Description                                                 |
| ----------- | --------------------------- | ---- | ----------------------------------------------------- |
| phoneNumber | string                      | Yes  | Phone number.                                           |
| countryCode | string                      | Yes  | Country code, for example, **CN** (China). All country codes are supported.             |
| callback    | AsyncCallback&lt;string&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.formatPhoneNumberToE164("138xxxxxxxx", "CN", (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.formatPhoneNumberToE164<sup>7+</sup>

formatPhoneNumberToE164\(phoneNumber: string, countryCode: string\): Promise<string\>

Converts a phone number into the E.164 format. This API uses a promise to return the result.

The phone number must match the specified country code. For example, for a China phone number, the country code must be **CN**. Otherwise, **null** will be returned.

All country codes are supported.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type  | Mandatory| Description                                    |
| ----------- | ------ | ---- | ---------------------------------------- |
| phoneNumber | string | Yes  | Phone number.                              |
| countryCode | string | Yes  | Country code, for example, **CN** (China). All country codes are supported.|

**Return value**

| Type                 | Description                                                        |
| --------------------- | ------------------------------------------------------------ |
| Promise&lt;string&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.formatPhoneNumberToE164("138xxxxxxxx", "CN");
promise.then(data => {
    console.log(`formatPhoneNumberToE164 success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`formatPhoneNumberToE164 fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.muteRinger<sup>8+</sup>

muteRinger\(callback: AsyncCallback<void\>\): void

Mutes the ringtone while it is playing. It does not work if the ringtone has been muted. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name     | Type                     | Mandatory| Description      |
| ----------- | ------------------------- | ---- | ---------- |
| callback    | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.muteRinger((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.muteRinger<sup>8+</sup>

muteRinger\(\): Promise<void\>

Mutes the ringtone while it is playing. It does not work if the ringtone has been muted. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.muteRinger();
promise.then(data => {
    console.log(`muteRinger success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`muteRinger fail, promise: err->${JSON.stringify(err)}`);
});
```


## call.answerCall<sup>7+</sup>

answerCall\(callId: number, callback: AsyncCallback<void\>\): void

Answers a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description                                           |
| -------- | ------------------------- | ---- | ----------------------------------------------- |
| callId   | number                    | Yes  | Call ID. You can obtain the value by subscribing to **callDetailsChange** events.|
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.                                     |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.answerCall(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.answerCall<sup>7+</sup>

answerCall(callId?: number\): Promise<void\>

Answers a call. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description                                                        |
| ------ | ------ | ---- | ------------------------------------------------------------ |
| callId | number | No  | Call ID. You can obtain the value by subscribing to **callDetailsChange** events. This parameter is optional from API version 9.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.answerCall(1);
promise.then(data => {
    console.log(`answerCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`answerCall fail, promise: err->${JSON.stringify(err)}`);
});
```


## call.answerCall<sup>9+</sup>

answerCall\(callback: AsyncCallback<void\>\): void

Answers a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.answerCall((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.hangUpCall<sup>7+</sup>

hangUpCall\(callId: number, callback: AsyncCallback<void\>\): void

Ends a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description                                           |
| -------- | ------------------------- | ---- | ----------------------------------------------- |
| callId   | number                    | Yes  | Call ID. You can obtain the value by subscribing to **callDetailsChange** events.|
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.                                     |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.hangUpCall(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.hangUpCall<sup>7+</sup>

hangUpCall\(callId?: number\): Promise<void\>

Ends a call. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description                                                        |
| ------ | ------ | ---- | ------------------------------------------------------------ |
| callId | number | No  | Call ID. You can obtain the value by subscribing to **callDetailsChange** events. This parameter is optional from API version 9.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.hangUpCall(1);
promise.then(data => {
    console.log(`hangUpCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`hangUpCall fail, promise: err->${JSON.stringify(err)}`);
});
```


## call.hangUpCall<sup>9+</sup>

hangUpCall\(callback: AsyncCallback<void\>\): void

Ends a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |


**Example**

```js
call.hangUpCall((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.rejectCall<sup>7+</sup>

rejectCall(callId: number, callback: AsyncCallback\<void>): void

Rejects a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description                                           |
| -------- | ------------------------- | ---- | ----------------------------------------------- |
| callId   | number                    | Yes  | Call ID. You can obtain the value by subscribing to **callDetailsChange** events.|
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.                                     |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |


**Example**

```js
call.rejectCall(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.rejectCall<sup>7+</sup>

rejectCall\(callId: number, options: RejectMessageOptions, callback: AsyncCallback<void\>\): void

Rejects a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                          | Mandatory| Description                                           |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| callId   | number                                         | Yes  | Call ID. You can obtain the value by subscribing to **callDetailsChange** events.|
| options  | [RejectMessageOptions](#rejectmessageoptions7) | Yes  | Options for the call rejection message.                                 |
| callback | AsyncCallback&lt;void&gt;                      | Yes  | Callback used to return the result.                                     |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let rejectMessageOptions={
    messageContent: "Unknown number blocked"
}
call.rejectCall(1, rejectMessageOptions, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.rejectCall<sup>7+</sup>

rejectCall(callId?: number, options?: RejectMessageOptions\): Promise<void\>

Rejects a call. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name | Type                                          | Mandatory| Description                                                        |
| ------- | ---------------------------------------------- | ---- | ------------------------------------------------------------ |
| callId  | number                                         | No  | Call ID. You can obtain the value by subscribing to **callDetailsChange** events. This parameter is optional from API version 9.|
| options | [RejectMessageOptions](#rejectmessageoptions7) | No  | Options for the call rejection message.                                              |

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let rejectMessageOptions={
    messageContent: "Unknown number blocked"
}
let promise = call.rejectCall(1, rejectMessageOptions);
promise.then(data => {
    console.log(`rejectCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`rejectCall fail, promise: err->${JSON.stringify(err)}`);
});
```


## call.rejectCall<sup>9+</sup>

rejectCall\(callback: AsyncCallback<void\>\): void

Rejects a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.rejectCall((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.rejectCall<sup>9+</sup>

rejectCall\(options: RejectMessageOptions, callback: AsyncCallback<void\>\): void

Rejects a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                          | Mandatory| Description          |
| -------- | ---------------------------------------------- | ---- | -------------- |
| options  | [RejectMessageOptions](#rejectmessageoptions7) | Yes  | Options for the call rejection message.|
| callback | AsyncCallback&lt;void&gt;                      | Yes  | Callback used to return the result.    |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let rejectMessageOptions={
    messageContent: "Unknown number blocked"
}
call.rejectCall(rejectMessageOptions, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.holdCall<sup>7+</sup>

holdCall\(callId: number, callback: AsyncCallback<void\>\): void

Holds a call based on the specified call ID. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callId   | number                    | Yes  | Call ID.  |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.holdCall(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.holdCall<sup>7+</sup>

holdCall\(callId: number\): Promise<void\>

Holds a call based on the specified call ID. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.holdCall(1);
promise.then(data => {
    console.log(`holdCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`holdCall fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.unHoldCall<sup>7+</sup>

unHoldCall\(callId: number, callback: AsyncCallback<void\>\): void

Unholds a call based on the specified call ID. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callId   | number                    | Yes  | Call ID.  |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.unHoldCall(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.unHoldCall<sup>7+</sup>

unHoldCall\(callId: number\): Promise<void\>

Unholds a call based on the specified call ID. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.unHoldCall(1);
promise.then(data => {
    console.log(`unHoldCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`unHoldCall fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.switchCall<sup>7+</sup>

switchCall\(callId: number, callback: AsyncCallback<void\>\): void

Switches a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callId   | number                    | Yes  | Call ID.  |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.switchCall(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.switchCall<sup>7+</sup>

switchCall\(callId: number\): Promise<void\>

Switches a call. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.ANSWER_CALL

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID| Error Message                                    |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.switchCall(1);
promise.then(data => {
    console.log(`switchCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`switchCall fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.combineConference<sup>7+</sup>

combineConference\(callId: number, callback: AsyncCallback<void\>\): void

Combines two calls into a conference call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callId   | number                    | Yes  | Call ID.  |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.combineConference(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.combineConference<sup>7+</sup>

combineConference\(callId: number\): Promise<void\>

Combines two calls into a conference call. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.combineConference(1);
promise.then(data => {
    console.log(`combineConference success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`combineConference fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.getMainCallId<sup>7+</sup>

getMainCallId\(callId: number, callback: AsyncCallback<number\>\): void

Obtains the main call ID. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                       | Mandatory| Description                    |
| -------- | --------------------------- | ---- | ------------------------ |
| callId   | number                      | Yes  | Call ID.                |
| callback | AsyncCallback&lt;number&gt; | Yes  | Callback used to return the result.  |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |


**Example**

```js
call.getMainCallId(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.getMainCallId<sup>7+</sup>

getMainCallId\(callId: number\): Promise<number\>

Obtains the main call ID. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type               | Description                           |
| ------------------- | ------------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.getMainCallId(1);
promise.then(data => {
    console.log(`getMainCallId success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`getMainCallId fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.getSubCallIdList<sup>7+</sup>

getSubCallIdList\(callId: number, callback: AsyncCallback<Array<string\>\>\): void

Obtains the list of subcall IDs. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                          | Mandatory| Description                        |
| -------- | ------------------------------ | ---- | ---------------------------- |
| callId   | number                         | Yes  | Call ID.                    |
| callback | AsyncCallback<Array<string\>\> | Yes  | Callback used to return the result.  |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.getSubCallIdList(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.getSubCallIdList<sup>7+</sup>

getSubCallIdList\(callId: number\): Promise<Array<string\>\>

Obtains the list of subcall IDs. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type                         | Description                               |
| ----------------------------- | ----------------------------------- |
| Promise&lt;Array<string\>&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.getSubCallIdList(1);
promise.then(data => {
    console.log(`getSubCallIdList success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`getSubCallIdList fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.getCallIdListForConference<sup>7+</sup>

getCallIdListForConference\(callId: number, callback: AsyncCallback<Array<string\>>\): void

Obtains the list of call IDs in a conference. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                               | Mandatory| Description                            |
| -------- | ----------------------------------- | ---- | -------------------------------- |
| callId   | number                              | Yes  | Call ID.                        |
| callback | AsyncCallback&lt;Array<string\>&gt; | Yes  | Callback used to return the result.  |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.getCallIdListForConference(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.getCallIdListForConference<sup>7+</sup>

getCallIdListForConference\(callId: number\): Promise<Array<string\>\>

Obtains the list of call IDs in a conference. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type                         | Description                                   |
| ----------------------------- | --------------------------------------- |
| Promise&lt;Array<string\>&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.getCallIdListForConference(1);
promise.then(data => {
    console.log(`getCallIdListForConference success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`getCallIdListForConference fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.getCallWaitingStatus<sup>7+</sup>

getCallWaitingStatus\(slotId: number, callback: AsyncCallback<CallWaitingStatus\>\): void

Obtains the call waiting status. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                                       | Mandatory| Description                                                        |
| -------- | ----------------------------------------------------------- | ---- | ------------------------------------------------------------ |
| slotId   | number                                                      | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2                      |
| callback | AsyncCallback&lt;[CallWaitingStatus](#callwaitingstatus7)\> | Yes  | Callback used to return the result.<br> <br>- **0**: Call waiting is disabled.<br>- **1**: Call waiting is enabled.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.getCallWaitingStatus(0, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.getCallWaitingStatus<sup>7+</sup>

getCallWaitingStatus\(slotId: number\): Promise<CallWaitingStatus\>

Obtains the call waiting status. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description                                  |
| ------ | ------ | ---- | -------------------------------------- |
| slotId | number | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|

**Return value**

| Type                                                   | Description                                                        |
| ------------------------------------------------------- | ------------------------------------------------------------ |
| Promise&lt;[CallWaitingStatus](#callwaitingstatus7)&gt; | Promise used to return the result.<br>- **0**: Call waiting is disabled.<br>- **1**: Call waiting is enabled.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.getCallWaitingStatus(0);
promise.then(data => {
    console.log(`getCallWaitingStatus success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`getCallWaitingStatus fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.setCallWaiting<sup>7+</sup>

setCallWaiting\(slotId: number, activate: boolean, callback: AsyncCallback<void\>\): void

Sets the call waiting switch. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                | Mandatory| Description                                                        |
| -------- | -------------------- | ---- | ------------------------------------------------------------ |
| slotId   | number               | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2                      |
| activate | boolean              | Yes  | Whether to enable call waiting.<br>- **false**: Disable call waiting.<br>- **true**: Enable call waiting.|
| callback | AsyncCallback<void\> | Yes  | Callback used to return the result.                                                  |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.setCallWaiting(0, true, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.setCallWaiting<sup>7+</sup>

setCallWaiting\(slotId: number, activate: boolean\): Promise<void\>

Sets the call waiting switch. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type   | Mandatory| Description                                                        |
| -------- | ------- | ---- | ------------------------------------------------------------ |
| slotId   | number  | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2                      |
| activate | boolean | Yes  | Whether to enable call waiting.<br>- **false**: Disable call waiting.<br>- **true**: Enable call waiting.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.setCallWaiting(0, true);
promise.then(data => {
    console.log(`setCallWaiting success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`setCallWaiting fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.startDTMF<sup>7+</sup>

startDTMF\(callId: number, character: string, callback: AsyncCallback<void\>\): void

Enables DTMF. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name   | Type                | Mandatory| Description      |
| --------- | -------------------- | ---- | ---------- |
| callId    | number               | Yes  | Call ID.  |
| character | string               | Yes  | DTMF code.  |
| callback  | AsyncCallback<void\> | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.startDTMF(1, "0", (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.startDTMF<sup>7+</sup>

startDTMF\(callId: number, character: string\): Promise<void\>

Enables DTMF. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name   | Type  | Mandatory| Description    |
| --------- | ------ | ---- | -------- |
| callId    | number | Yes  | Call ID.|
| character | string | Yes  | DTMF code.|

**Return value**

| Type               | Description                   |
| ------------------- | ----------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.startDTMF(1, "0");
promise.then(data => {
    console.log(`startDTMF success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`startDTMF fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.stopDTMF<sup>7+</sup>

stopDTMF\(callId: number, callback: AsyncCallback<void\>\): void

Stops DTMF. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callId   | number                    | Yes  | Call ID.  |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.stopDTMF(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.stopDTMF<sup>7+</sup>

stopDTMF\(callId: number\): Promise<void\>

Stops DTMF. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.stopDTMF(1);
promise.then(data => {
    console.log(`stopDTMF success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`stopDTMF fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.isInEmergencyCall<sup>7+</sup>

isInEmergencyCall\(callback: AsyncCallback<boolean\>\): void

Checks whether a call is an emergency call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                        | Mandatory| Description      |
| -------- | ---------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.isInEmergencyCall((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.isInEmergencyCall<sup>7+</sup>

isInEmergencyCall\(\): Promise<boolean\>

Checks whether a call is an emergency call. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type                  | Description                       |
| ---------------------- | --------------------------- |
| Promise&lt;boolean&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.isInEmergencyCall();
promise.then(data => {
    console.log(`isInEmergencyCall success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`isInEmergencyCall fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.on('callDetailsChange')<sup>7+</sup>

on\(type: 'callDetailsChange', callback: Callback<CallAttributeOptions\>\): void

Subscribes to **callDetailsChange** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                                   | Mandatory| Description                      |
| -------- | ------------------------------------------------------- | ---- | -------------------------- |
| type     | string                                                  | Yes  | Call details change during a call.|
| callback | Callback<[CallAttributeOptions](#callattributeoptions7)> | Yes  | Callback used to return the result.                |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.on('callDetailsChange', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.on('callEventChange')<sup>8+</sup>

on\(type: 'callEventChange', callback: Callback<CallEventOptions\>\): void

Subscribes to **callEventChange** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                            | Mandatory| Description                      |
| -------- | ------------------------------------------------ | ---- | -------------------------- |
| type     | string                                           | Yes  | Call event change during a call.|
| callback | Callback<[CallEventOptions](#calleventoptions8)> | Yes  | Callback used to return the result.                |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.on('callEventChange', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.on('callDisconnectedCause')<sup>8+</sup>

on\(type: 'callDisconnectedCause', callback: Callback<DisconnectedDetails\>): void

Subscribes to **callDisconnectedCause** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                                  | Mandatory| Description                      |
| -------- | ------------------------------------------------------ | ---- | -------------------------- |
| type     | string                                                 | Yes  | Cause of the call disconnection.|
| callback | Callback<[DisconnectedDetails](#disconnecteddetails9)> | Yes  | Callback used to return the result.                |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.on('callDisconnectedCause', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.on('mmiCodeResult')<sup>9+</sup>

on\(type: 'mmiCodeResult', callback: Callback<MmiCodeResults\>\): void

Subscribes to **mmiCodeResult** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                        | Mandatory| Description                 |
| -------- | -------------------------------------------- | ---- | --------------------- |
| type     | string                                       | Yes  | Man-machine interface (MMI) code result.|
| callback | Callback<[MmiCodeResults](#mmicoderesults9)> | Yes  | Callback used to return the result.           |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.on('mmiCodeResult', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.off('callDetailsChange')<sup>7+</sup>

off\(type: 'callDetailsChange', callback?: Callback<CallAttributeOptions\>\): void

Unsubscribes from **callDetailsChange** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                                    | Mandatory| Description                              |
| -------- | -------------------------------------------------------- | ---- | ---------------------------------- |
| type     | string                                                   | Yes  | IMS registration status changes.|
| callback | Callback<[CallAttributeOptions](#callattributeoptions7)> | No  | Callback used to return the result.                        |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.off('callDetailsChange', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.off('callEventChange')<sup>8+</sup>

off\(type: 'callEventChange', callback?: Callback<CallEventOptions\>\): void

Unsubscribes from **callEventChange** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                            | Mandatory| Description                              |
| -------- | ------------------------------------------------ | ---- | ---------------------------------- |
| type     | string                                           | Yes  | Unsubscription from call event changes when a call ends.|
| callback | Callback<[CallEventOptions](#calleventoptions8)> | No  | Callback used to return the result.                        |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.off('callEventChange', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.off('callDisconnectedCause')<sup>8+</sup>

off\(type: 'callDisconnectedCause', callback?: Callback<DisconnectedDetails\>\): void

Unsubscribes from **callDisconnectedCause** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                                      | Mandatory| Description                |
| -------- | ---------------------------------------------------------- | ---- | -------------------- |
| type     | 'callDisconnectedCause'                                    | Yes  | Unsubscription from the call disconnection cause when a call ends.|
| callback | Callback**<**[DisconnectedDetails](#disconnecteddetails9)> | No  | Callback used to return the result.          |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.off('callDisconnectedCause', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.off('mmiCodeResult')<sup>9+</sup>

off\(type: 'mmiCodeResult', callback?: Callback<MmiCodeResults\>\): void

Unsubscribes from **mmiCodeResult** events. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                            | Mandatory| Description       |
| -------- | ------------------------------------------------ | ---- | ----------- |
| type     | 'mmiCodeResult'                                  | Yes  | MMI code result.|
| callback | Callback<[MmiCodeResults](#mmicoderesults9)> | No  | Callback used to return the result. |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.off('mmiCodeResult', data => {
    console.log(`callback: data->${JSON.stringify(data)}`);
});
```

## call.isNewCallAllowed<sup>8+</sup>

isNewCallAllowed\(callback: AsyncCallback<boolean\>\): void

Checks whether a new call is allowed. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                        | Mandatory| Description      |
| -------- | ---------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.isNewCallAllowed((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.isNewCallAllowed<sup>8+</sup>

isNewCallAllowed\(\): Promise<boolean\>

Checks whether a new call is allowed. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type                  | Description                       |
| ---------------------- | --------------------------- |
| Promise&lt;boolean&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.isNewCallAllowed();
promise.then(data => {
    console.log(`isNewCallAllowed success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`isNewCallAllowed fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.separateConference<sup>8+</sup>

separateConference\(callId: number, callback: AsyncCallback<void\>\): void

Separates calls from a conference call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callId   | number                    | Yes  | Call ID.  |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.separateConference(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.separateConference<sup>8+</sup>

separateConference\(callId: number\): Promise<void\>

Separates calls from a conference call. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description    |
| ------ | ------ | ---- | -------- |
| callId | number | Yes  | Call ID.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.separateConference(1);
promise.then(data => {
    console.log(`separateConference success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`separateConference fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.getCallRestrictionStatus<sup>8+</sup>

getCallRestrictionStatus\(slotId: number, type: CallRestrictionType, callback: AsyncCallback<RestrictionStatus\>\): void

Obtains the call restriction status. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                                        | Mandatory| Description                                  |
| -------- | ------------------------------------------------------------ | ---- | -------------------------------------- |
| slotId   | number                                                       | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| type     | [CallRestrictionType](#callrestrictiontype8)                 | Yes  | Call restriction type.                       |
| callback | AsyncCallback&lt;[RestrictionStatus](#restrictionstatus8)&gt; | Yes  | Callback used to return the result.                |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.getCallRestrictionStatus(0, 1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.getCallRestrictionStatus<sup>8+</sup>

getCallRestrictionStatus\(slotId: number, type: CallRestrictionType\): Promise<RestrictionStatus\>

Obtains the call restriction status. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type                                        | Mandatory| Description                                  |
| ------ | -------------------------------------------- | ---- | -------------------------------------- |
| slotId | number                                       | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| type   | [CallRestrictionType](#callrestrictiontype8) | Yes  | Call restriction type.                       |

**Return value**

| Type                                                   | Description                       |
| ------------------------------------------------------- | --------------------------- |
| Promise&lt;[RestrictionStatus](#restrictionstatus8)&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.getCallRestrictionStatus(0, 1);
promise.then(data => {
    console.log(`getCallRestrictionStatus success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`getCallRestrictionStatus fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.setCallRestriction<sup>8+</sup>

setCallRestriction\(slotId: number, info: CallRestrictionInfo, callback: AsyncCallback<void\>\): void

Sets the call restriction status. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                       | Mandatory| Description                                  |
| -------- | ------------------------------------------- | ---- | -------------------------------------- |
| slotId   | number                                      | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| info     | [CallRestrictionInfo](#callrestrictioninfo8) | Yes  | Call restriction information.                        |
| callback | AsyncCallback&lt;void&gt;                   | Yes  | Callback used to return the result.                            |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let callRestrictionInfo={
    type: 1,
    password: "123456",
    mode: 1
}
call.setCallRestriction(0, callRestrictionInfo, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.setCallRestriction<sup>8+</sup>

setCallRestriction\(slotId: number, info: CallRestrictionInfo\): Promise<void\>

Sets the call restriction status. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type                                        | Mandatory| Description                                  |
| ------ | -------------------------------------------- | ---- | -------------------------------------- |
| slotId | number                                       | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| info   | [CallRestrictionInfo](#callrestrictioninfo8) | Yes  | Call restriction information.                        |

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let callRestrictionInfo={
    type: 1,
    password: "123456",
    mode: 1
}
let promise = call.setCallRestriction(0, callRestrictionInfo);
promise.then(data => {
    console.log(`setCallRestriction success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`setCallRestriction fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.getCallTransferInfo<sup>8+</sup>

getCallTransferInfo\(slotId: number, type: CallTransferType, callback: AsyncCallback<CallTransferResult\>\): void

Obtains call transfer information. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                                        | Mandatory| Description                                  |
| -------- | ------------------------------------------------------------ | ---- | -------------------------------------- |
| slotId   | number                                                       | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| type     | [CallTransferType](#calltransfertype8)                       | Yes  | Call transfer type.                        |
| callback | AsyncCallback&lt;[CallTransferResult](#calltransferresult8)&gt; | Yes  | Callback used to return the result.            |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.getCallTransferInfo(0, call.CallTransferType.TRANSFER_TYPE_BUSY, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.getCallTransferInfo<sup>8+</sup>

getCallTransferInfo\(slotId: number, type: CallTransferType): Promise<CallTransferResult\>

Obtains call transfer information. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.GET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type                                  | Mandatory| Description                                  |
| ------ | -------------------------------------- | ---- | -------------------------------------- |
| slotId | number                                 | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| type   | [CallTransferType](#calltransfertype8) | Yes  | Call transfer type.                        |

**Return value**

| Type                                                     | Description                       |
| --------------------------------------------------------- | --------------------------- |
| Promise&lt;[CallTransferResult](#calltransferresult8)&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.getCallTransferInfo(0, call.CallTransferType.TRANSFER_TYPE_BUSY);
promise.then(data => {
    console.log(`getCallTransferInfo success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`getCallTransferInfo fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.setCallTransfer<sup>8+</sup>

setCallTransfer\(slotId: number, info: CallTransferInfo, callback: AsyncCallback<void\>\): void

Sets call transfer information. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                 | Mandatory| Description                                  |
| -------- | ------------------------------------- | ---- | -------------------------------------- |
| slotId   | number                                | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| info     | [CallTransferInfo](#calltransferinfo8) | Yes  | Call transfer information.                       |
| callback | AsyncCallback&lt;void&gt;             | Yes  | Callback used to return the result.                            |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let callTransferInfo={
    transferNum: "111",
    type: 1,
    settingType: 1
}
call.setCallTransfer(0, callTransferInfo, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.setCallTransfer<sup>8+</sup>

setCallTransfer\(slotId: number, info: CallTransferInfo): Promise<void\>

Sets call transfer information. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type                                 | Mandatory| Description                                  |
| ------ | ------------------------------------- | ---- | -------------------------------------- |
| slotId | number                                | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| info   | [CallTransferInfo](#calltransferinfo8) | Yes  | Call transfer information.                       |

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let callTransferInfo={
    transferNum: "111",
    type: 1,
    settingType: 1
}
let promise = call.setCallTransfer(0, callTransferInfo);
promise.then(data => {
    console.log(`setCallTransfer success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`setCallTransfer fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.isRinging<sup>8+</sup>

isRinging\(callback: AsyncCallback<boolean\>\): void

Checks whether the ringtone is playing. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                        | Mandatory| Description      |
| -------- | ---------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.isRinging((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.isRinging<sup>8+</sup>

isRinging\(\): Promise<boolean\>

Checks whether the ringtone is playing. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type                  | Description                       |
| ---------------------- | --------------------------- |
| Promise&lt;boolean&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.isRinging();
promise.then(data => {
    console.log(`isRinging success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`isRinging fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.setMuted<sup>8+</sup>

setMuted\(callback: AsyncCallback<void\>\): void

Sets call muting. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.setMuted((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.setMuted<sup>8+</sup>

setMuted\(\): Promise<void\>

Sets call muting. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.setMuted();
promise.then(data => {
    console.log(`setMuted success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`setMuted fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.cancelMuted<sup>8+</sup>

cancelMuted(callback: AsyncCallback<void\>): void

Cancels call muting. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description      |
| -------- | ------------------------- | ---- | ---------- |
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.cancelMuted((err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.cancelMuted<sup>8+</sup>

cancelMuted(): Promise<void\>

Cancels call muting. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.cancelMuted();
promise.then(data => {
    console.log(`cancelMuted success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`cancelMuted fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.setAudioDevice<sup>8+</sup>

setAudioDevice\(device: AudioDevice, callback: AsyncCallback<void\>\): void

Sets the audio device for a call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                        | Mandatory| Description      |
| -------- | ---------------------------- | ---- | ---------- |
| device   | [AudioDevice](#audiodevice8) | Yes  | Audio device.|
| callback | AsyncCallback&lt;void&gt;    | Yes  | Callback used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.setAudioDevice(1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.setAudioDevice<sup>9+</sup>

setAudioDevice\(device: AudioDevice, options: AudioDeviceOptions, callback: AsyncCallback<void\>\): void

Sets the audio device for a call based on the specified options. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                                      | Mandatory| Description          |
| -------- | ------------------------------------------ | ---- | -------------- |
| device   | [AudioDevice](#audiodevice8)               | Yes  | Audio device.    |
| options  | [AudioDeviceOptions](#audiodeviceoptions9) | Yes  | Audio device parameters.|
| callback | AsyncCallback&lt;void&gt;                  | Yes  | Callback used to return the result.    |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let audioDeviceOptions={
    bluetoothAddress: "IEEE 802-2014"
}
call.setAudioDevice(1, audioDeviceOptions, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```


## call.setAudioDevice<sup>9+</sup>

setAudioDevice(device: AudioDevice, options?: AudioDeviceOptions): Promise<void\>

Sets the audio device for a call based on the specified options. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name | Type                                      | Mandatory| Description              |
| ------- | ------------------------------------------ | ---- | ------------------ |
| device  | [AudioDevice](#audiodevice8)               | Yes  | Audio device.        |
| options | [AudioDeviceOptions](#audiodeviceoptions9) | No  | Audio device parameters.|

**Return value**

| Type               | Description                           |
| ------------------- | ------------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let audioDeviceOptions={
    bluetoothAddress: "IEEE 802-2014"
}
let promise = call.setAudioDevice(1, audioDeviceOptions);
promise.then(data => {
    console.log(`setAudioDevice success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`setAudioDevice fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.joinConference<sup>8+</sup>

joinConference(mainCallId: number, callNumberList: Array<string\>, callback: AsyncCallback<void\>): void

Joins a conference call. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name        | Type                     | Mandatory| Description           |
| -------------- | ------------------------- | ---- | --------------- |
| mainCallId     | number                    | Yes  | Main call ID.     |
| callNumberList | Array<string\>            | Yes  | List of call numbers.|
| callback       | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.     |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let callNumberList: Array<string> = [
    "138XXXXXXXX"
];
call.joinConference(1, callNumberList, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```

## call.joinConference<sup>8+</sup>

joinConference(mainCallId: number, callNumberList: Array<string\>): Promise<void\>

Joins a conference call. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name        | Type          | Mandatory| Description           |
| -------------- | -------------- | ---- | --------------- |
| mainCallId     | number         | Yes  | Main call ID.     |
| callNumberList | Array<string\> | Yes  | List of call numbers.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let callNumberList: Array<string> = [
    "138XXXXXXXX"
];
let promise = call.joinConference(1, callNumberList);
promise.then(data => {
    console.log(`joinConference success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`joinConference fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.updateImsCallMode<sup>8+</sup>

updateImsCallMode(callId: number, mode: ImsCallMode, callback: AsyncCallback<void\>): void

Updates the IMS call mode. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                        | Mandatory| Description          |
| -------- | ---------------------------- | ---- | -------------- |
| callId   | number                       | Yes  | Call ID.      |
| mode     | [ImsCallMode](#imscallmode8) | Yes  | IMS call mode.|
| callback | AsyncCallback&lt;void&gt;    | Yes  | Callback used to return the result.    |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.updateImsCallMode(1, 1, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```

## call.updateImsCallMode<sup>8+</sup>

updateImsCallMode(callId: number, mode: ImsCallMode): Promise<void\>

Updates the IMS call mode. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type                        | Mandatory| Description          |
| ------ | ---------------------------- | ---- | -------------- |
| callId | number                       | Yes  | Call ID.      |
| mode   | [ImsCallMode](#imscallmode8) | Yes  | IMS call mode.|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.updateImsCallMode(1, 1);
promise.then(data => {
    console.log(`updateImsCallMode success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`updateImsCallMode fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.enableImsSwitch<sup>8+</sup>

enableImsSwitch(slotId: number, callback: AsyncCallback<void\>): void

Enables the IMS switch. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description                                  |
| -------- | ------------------------- | ---- | -------------------------------------- |
| slotId   | number                    | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.                            |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.enableImsSwitch(0, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```

## call.enableImsSwitch<sup>8+</sup>

enableImsSwitch(slotId: number): Promise<void\>

Enables the IMS switch. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description                                  |
| ------ | ------ | ---- | -------------------------------------- |
| slotId | number | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.enableImsSwitch(0);
promise.then(data => {
    console.log(`enableImsSwitch success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`enableImsSwitch fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.disableImsSwitch<sup>8+</sup>

disableImsSwitch(slotId: number, callback: AsyncCallback<void\>): void

Disables the IMS switch. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                     | Mandatory| Description                                  |
| -------- | ------------------------- | ---- | -------------------------------------- |
| slotId   | number                    | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.                            |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.disableImsSwitch(0, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```

## call.disableImsSwitch<sup>8+</sup>

disableImsSwitch(slotId: number): Promise<void\>

Disables the IMS switch. This API uses a promise to return the result.

**System API**: This is a system API.

**Required permission**: ohos.permission.SET_TELEPHONY_STATE

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description                                  |
| ------ | ------ | ---- | -------------------------------------- |
| slotId | number | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                  Error Message                   |
| -------- | -------------------------------------------- |
| 201      | Permission denied.                           |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.disableImsSwitch(0);
promise.then(data => {
    console.log(`disableImsSwitch success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`disableImsSwitch fail, promise: err->${JSON.stringify(err)}`);
});
```

## call.isImsSwitchEnabled<sup>8+</sup>

isImsSwitchEnabled(slotId: number, callback: AsyncCallback<boolean\>): void

Checks whether the IMS switch is enabled. This API uses an asynchronous callback to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name  | Type                        | Mandatory| Description                                  |
| -------- | ---------------------------- | ---- | -------------------------------------- |
| slotId   | number                       | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|
| callback | AsyncCallback&lt;boolean&gt; | Yes  | Callback used to return the result.                            |

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
call.isImsSwitchEnabled(0, (err, data) => {
    console.log(`callback: err->${JSON.stringify(err)}, data->${JSON.stringify(data)}`);
});
```

## call.isImsSwitchEnabled<sup>8+</sup>

isImsSwitchEnabled(slotId: number): Promise<boolean\>

Checks whether the IMS switch is enabled. This API uses a promise to return the result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

**Parameters**

| Name| Type  | Mandatory| Description                                  |
| ------ | ------ | ---- | -------------------------------------- |
| slotId | number | Yes  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|

**Return value**

| Type               | Description                       |
| ------------------- | --------------------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**
For details about the following error codes, see [Telephony Error Codes](../../reference/errorcodes/errorcode-telephony.md).

| ID|                 Error Message                    |
| -------- | -------------------------------------------- |
| 401      | Parameter error.                             |
| 8300001  | Invalid parameter value.                     |
| 8300002  | Operation failed. Cannot connect to service. |
| 8300003  | System internal error.                       |
| 8300999  | Unknown error code.                          |

**Example**

```js
let promise = call.isImsSwitchEnabled(0);
promise.then(data => {
    console.log(`isImsSwitchEnabled success, promise: data->${JSON.stringify(data)}`);
}).catch(err => {
    console.error(`isImsSwitchEnabled fail, promise: err->${JSON.stringify(err)}`);
});
```

## DialOptions

Provides an option for determining whether a call is a video call.

**System capability**: SystemCapability.Telephony.CallManager

|        Name             | Type                              | Mandatory| Description                                                                                            |
| ------------------------ | ---------------------------------- | ---- | ----------------------------------------------------------------------------------------------- |
| extras                   | boolean                            | No  | Indication of a video call. <br>- **true**: video call<br>- **false** (default): voice call|
| accountId <sup>8+</sup>  | number                             | No  | Account ID.<br>- **0**: card slot 1<br>- **1**: card slot 2<br>This is a system API.                                   |
| videoState <sup>8+</sup> | [VideoStateType](#videostatetype7) | No  | Video state type. This is a system API.                                                                |
| dialScene <sup>8+</sup>  | [DialScene](#dialscene8)           | No  | Dialup scenario. This is a system API.                                                                    |
| dialType <sup>8+</sup>   | [DialType](#dialtype8)             | No  | Dialup type. This is a system API.                                                                    |

## DialCallOptions<sup>9+</sup>

Defines options for initiating a call.

**System capability**: SystemCapability.Telephony.CallManager

|        Name             | Type                              | Mandatory| Description                                                        |
| ------------------------ | ---------------------------------- | ---- | ------------------------------------------------------------ |
| accountId <sup>9+</sup>  | number                             | No  | Account ID.<br>- **0**: card slot 1<br>- **1**: card slot 2<br>This is a system API.|
| videoState <sup>9+</sup> | [VideoStateType](#videostatetype7) | No  | Video state type. This is a system API.                            |
| dialScene <sup>9+</sup>  | [DialScene](#dialscene8)           | No  | Dialup scenario. This is a system API.                                |
| dialType <sup>9+</sup>   | [DialType](#dialtype8)             | No  | Dialup type. This is a system API.                                |

## CallState

Enumerates call states.

**System capability**: SystemCapability.Telephony.CallManager

| Name              | Value  | Description                                                        |
| ------------------ | ---- | ------------------------------------------------------------ |
| CALL_STATE_UNKNOWN | -1   | The call status fails to be obtained and is unknown.                        |
| CALL_STATE_IDLE    | 0    | No call is in progress.                                    |
| CALL_STATE_RINGING | 1    | The call is in the ringing or waiting state.                                    |
| CALL_STATE_OFFHOOK | 2    | At least one call is in dialing, active, or on hold, and no new incoming call is ringing or waiting.|

## EmergencyNumberOptions<sup>7+</sup>

Provides an option for determining whether a number is an emergency number for the SIM card in the specified slot.

**System capability**: SystemCapability.Telephony.CallManager

|  Name | Type  | Mandatory| Description                                          |
| ------ | ------ | ---- | ---------------------------------------------- |
| slotId | number | No  | Card slot ID.<br>- **0**: card slot 1<br>- **1**: card slot 2|

## NumberFormatOptions<sup>7+</sup>

Provides an option for number formatting.

**System capability**: SystemCapability.Telephony.CallManager

|    Name    | Type  | Mandatory| Description                                                      |
| ----------- | ------ | ---- | ---------------------------------------------------------- |
| countryCode | string | No  | Country code, for example, **CN** (China). All country codes are supported. The default value is **CN**.|

## ImsCallMode<sup>8+</sup>

Enumerates IMS call modes.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                  | Value  | Description              |
| ---------------------- | ---- | ------------------ |
| CALL_MODE_AUDIO_ONLY   | 0    | Audio call only.      |
| CALL_MODE_SEND_ONLY    | 1    | Sending calls only.        |
| CALL_MODE_RECEIVE_ONLY | 2    | Receiving calls only.        |
| CALL_MODE_SEND_RECEIVE | 3    | Sending and receiving calls.|
| CALL_MODE_VIDEO_PAUSED | 4    | Pausing video calls.      |

## AudioDevice<sup>8+</sup>

Enumerates audio devices.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                | Value  | Description        |
| -------------------- | ---- | ------------ |
| DEVICE_EARPIECE      | 0    | Headset device.    |
| DEVICE_SPEAKER       | 1    | Speaker device.|
| DEVICE_WIRED_HEADSET | 2    | Wired headset device.|
| DEVICE_BLUETOOTH_SCO | 3    | Bluetooth SCO device. |
| DEVICE_MIC           | 4    | Microphone device|

## CallRestrictionType<sup>8+</sup>

Enumerates call restriction types.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                                         | Value  | Description                      |
| --------------------------------------------- | ---- | -------------------------- |
| RESTRICTION_TYPE_ALL_INCOMING                 | 0    | Barring of all incoming calls.              |
| RESTRICTION_TYPE_ALL_OUTGOING                 | 1    | Barring of all outgoing calls.              |
| RESTRICTION_TYPE_INTERNATIONAL                | 2    | Barring of international calls.              |
| RESTRICTION_TYPE_INTERNATIONAL_EXCLUDING_HOME | 3    | Barring of international calls except those in the home country.|
| RESTRICTION_TYPE_ROAMING_INCOMING             | 4    | Barring of incoming roaming calls.              |
| RESTRICTION_TYPE_ALL_CALLS                    | 5    | Barring of all calls.              |
| RESTRICTION_TYPE_OUTGOING_SERVICES            | 6    | Barring of outgoing services.              |
| RESTRICTION_TYPE_INCOMING_SERVICES            | 7    | Barring of incoming services.              |

## CallTransferInfo<sup>8+</sup>

Defines the call transfer information.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

|          Name           | Type                                                | Mandatory| Description            |
| ------------------------ | ---------------------------------------------------- | ---- | ---------------- |
| transferNum              | string                                               | Yes  | Call transfer number.        |
| type                     | [CallTransferType](#calltransfertype8)               | Yes  | Call transfer type.    |
| settingType              | [CallTransferSettingType](#calltransfersettingtype8) | Yes  | Call transfer setting type.|
| startHour<sup>9+</sup>   | number                                               | No  | Hour in the start time.|
| startMinute<sup>9+</sup> | number                                               | No  | Minute in the start time.|
| endHour<sup>9+</sup>     | number                                               | No  | Minute in the end time.|
| endMinute<sup>9+</sup>   | number                                               | No  | Minute in the end time.|

## CallTransferType<sup>8+</sup>

Enumerates call transfer types.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                       | Value  | Description        |
| --------------------------- | ---- | ------------ |
| TRANSFER_TYPE_UNCONDITIONAL | 0    | Call forwarding unconditional.  |
| TRANSFER_TYPE_BUSY          | 1    | Call forwarding busy.    |
| TRANSFER_TYPE_NO_REPLY      | 2    | Call forwarding on no reply.  |
| TRANSFER_TYPE_NOT_REACHABLE | 3    | Call forwarding on no user not reachable.|

## CallTransferSettingType<sup>8+</sup>

Enumerates call transfer setting types.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                      | Value  | Description        |
| -------------------------- | ---- | ------------ |
| CALL_TRANSFER_DISABLE      | 0    | Disabling of call transfer.|
| CALL_TRANSFER_ENABLE       | 1    | Enabling of call transfer.|
| CALL_TRANSFER_REGISTRATION | 3    | Registration of call transfer.|
| CALL_TRANSFER_ERASURE      | 4    | Erasing of call transfer.|

## CallAttributeOptions<sup>7+</sup>

Defines the call attribute options.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

|      Name      | Type                                    | Mandatory| Description          |
| --------------- | ---------------------------------------- | ---- | -------------- |
| accountNumber   | string                                   | Yes  | Account number.      |
| speakerphoneOn  | boolean                                  | Yes  | Speakerphone on.|
| accountId       | number                                   | Yes  | Account ID.        |
| videoState      | [VideoStateType](#videostatetype7)       | Yes  | Video state type.  |
| startTime       | number                                   | Yes  | Start time.      |
| isEcc           | boolean                                  | Yes  | Whether the call is an ECC.     |
| callType        | [CallType](#calltype7)                   | Yes  | Call type.      |
| callId          | number                                   | Yes  | Call ID.        |
| callState       | [DetailedCallState](#detailedcallstate7) | Yes  | Detailed call state.  |
| conferenceState | [ConferenceState](#conferencestate7)     | Yes  | Conference state.      |

## ConferenceState<sup>7+</sup>

Enumerates conference states.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                        | Value  | Description          |
| ---------------------------- | ---- | -------------- |
| TEL_CONFERENCE_IDLE          | 0    | Idle state.  |
| TEL_CONFERENCE_ACTIVE        | 1    | Active state.  |
| TEL_CONFERENCE_DISCONNECTING | 2    | Disconnecting state.  |
| TEL_CONFERENCE_DISCONNECTED  | 3    | Disconnected state.|

## CallType<sup>7+</sup>

Enumerates call types.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name         | Value  | Description        |
| ------------- | ---- | ------------ |
| TYPE_CS       | 0    | CS call.      |
| TYPE_IMS      | 1    | IMS call.     |
| TYPE_OTT      | 2    | OTT call.     |
| TYPE_ERR_CALL | 3    | Error call type.|

## VideoStateType<sup>7+</sup>

Video state type.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name      | Value  | Description    |
| ---------- | ---- | -------- |
| TYPE_VOICE | 0    | Voice state.|
| TYPE_VIDEO | 1    | Video state.|

## DetailedCallState<sup>7+</sup>

Enumerates detailed call states.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                     | Value  | Description          |
| ------------------------- | ---- | -------------- |
| CALL_STATUS_ACTIVE        | 0    | Active state.  |
| CALL_STATUS_HOLDING       | 1    | Hold state.  |
| CALL_STATUS_DIALING       | 2    | Dialing state.  |
| CALL_STATUS_ALERTING      | 3    | Alerting state.  |
| CALL_STATUS_INCOMING      | 4    | Incoming state.  |
| CALL_STATUS_WAITING       | 5    | Waiting state.  |
| CALL_STATUS_DISCONNECTED  | 6    | Disconnected state.|
| CALL_STATUS_DISCONNECTING | 7    | Disconnecting state.  |
| CALL_STATUS_IDLE          | 8    | Idle state.  |

## CallRestrictionInfo<sup>8+</sup>

Defines the call restriction information.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

|   Name  | Type                                        | Mandatory| Description        |
| -------- | -------------------------------------------- | ---- | ------------ |
| type     | [CallRestrictionType](#callrestrictiontype8) | Yes  | Call restriction type.|
| password | string                                       | Yes  | Password.        |
| mode     | [CallRestrictionMode](#callrestrictionmode8) | Yes  | Call restriction mode.|

## CallRestrictionMode<sup>8+</sup>

Enumerates call restriction modes.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                         | Value  | Description        |
| ----------------------------- | ---- | ------------ |
| RESTRICTION_MODE_DEACTIVATION | 0    | Call restriction deactivated.|
| RESTRICTION_MODE_ACTIVATION   | 1    | Call restriction activated.|

## CallEventOptions<sup>8+</sup>

Defines the call event options.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

|   Name | Type                                      | Mandatory| Description          |
| ------- | ------------------------------------------ | ---- | -------------- |
| eventId | [CallAbilityEventId](#callabilityeventid8) | Yes  | Call ability event ID.|

## CallAbilityEventId<sup>8+</sup>

Enumerates call ability event IDs.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                    | Value  | Description           |
| ------------------------ | ---- | --------------- |
| EVENT_DIAL_NO_CARRIER    | 1    | No available carrier during dialing. |
| EVENT_INVALID_FDN_NUMBER | 2    | Invalid FDN.|

## DialScene<sup>8+</sup>

Enumerates dialup scenarios.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name           | Value  | Description        |
| --------------- | ---- | ------------ |
| CALL_NORMAL     | 0    | Common call.    |
| CALL_PRIVILEGED | 1    | Privileged call.    |
| CALL_EMERGENCY  | 2    | Emergency call.|

## DialType<sup>8+</sup>

Enumerates dialup types.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                | Value  | Description            |
| -------------------- | ---- | ---------------- |
| DIAL_CARRIER_TYPE    | 0    | Carrier.    |
| DIAL_VOICE_MAIL_TYPE | 1    | Voice mail.|
| DIAL_OTT_TYPE        | 2    | OTT.     |

## RejectMessageOptions<sup>7+</sup>

Defines options for the call rejection message.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

|     Name      | Type  | Mandatory| Description    |
| -------------- | ------ | ---- | -------- |
| messageContent | string | Yes  | Message content.|

## CallTransferResult<sup>8+</sup>

Defines the call transfer result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

|          Name           |                 Type              | Mandatory|       Description      |
| ------------------------ | ---------------------------------- | ---- | ---------------- |
| status                   | [TransferStatus](#transferstatus8) |  Yes | Call transfer status.        |
| number                   | string                             |  Yes | Call transfer number.            |
| startHour<sup>9+</sup>   | number                             |  Yes | Hour in the start time.|
| startMinute<sup>9+</sup> | number                             |  Yes | Minute in the start time.|
| endHour<sup>9+</sup>     | number                             |  Yes | Minute in the end time.|
| endMinute<sup>9+</sup>   | number                             |  Yes | Minute in the end time.|

## CallWaitingStatus<sup>7+</sup>

Enumerates call waiting states.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name                | Value  | Description        |
| -------------------- | ---- | ------------ |
| CALL_WAITING_DISABLE | 0    | Call waiting disabled.|
| CALL_WAITING_ENABLE  | 1    | Call waiting enabled.|

## RestrictionStatus<sup>8+</sup>

Enumerates call restriction states.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name               | Value  | Description    |
| ------------------- | ---- | -------- |
| RESTRICTION_DISABLE | 0    | Call restriction disabled.|
| RESTRICTION_ENABLE  | 1    | Call restriction enabled.|

## TransferStatus<sup>8+</sup>

Enumerates call transfer states.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name            | Value  | Description    |
| ---------------- | ---- | -------- |
| TRANSFER_DISABLE | 0    | Call transfer disabled.|
| TRANSFER_ENABLE  | 1    | Call transfer enabled.|

## DisconnectedDetails<sup>9+</sup>

Defines the cause of a call disconnection.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name   |                    Type                   | Mandatory| Description           |
| ------- | ------------------------------------------ | ---- | --------------- |
| reason  | [DisconnectedReason](#disconnectedreason8) | Yes  | Cause of the call disconnection.   |
| message | string                                     | Yes  | Message indicating the call disconnection.|

## DisconnectedReason<sup>8+</sup>

Enumerates causes of call disconnection.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

|                              Name                           | Value  |                  Description                  |
| ------------------------------------------------------------ | ---- | --------------------------------------- |
| UNASSIGNED_NUMBER                                            | 1    | Unallocated (unassigned) number.                     |
| NO_ROUTE_TO_DESTINATION                                      | 3    | No route to destination.                       |
| CHANNEL_UNACCEPTABLE                                         | 6    | Channel unacceptable.                         |
| OPERATOR_DETERMINED_BARRING                                  | 8    | Operator determined barring (ODB).                             |
| CALL_COMPLETED_ELSEWHERE<sup>9+</sup>                        | 13   | Call completed elsewhere.                     |
| NORMAL_CALL_CLEARING                                         | 16   | Normal call clearing.                           |
| USER_BUSY                                                    | 17   | User busy.                                 |
| NO_USER_RESPONDING                                           | 18   | No user responding.                             |
| USER_ALERTING_NO_ANSWER                                      | 19   | User alerting, no answer.                 |
| CALL_REJECTED                                                | 21   | Call rejected.                               |
| NUMBER_CHANGED                                               | 22   | Number changed.                               |
| CALL_REJECTED_DUE_TO_FEATURE_AT_THE_DESTINATION<sup>9+</sup> | 24   | Call rejected due to feature at the destination.|
| FAILED_PRE_EMPTION<sup>9+</sup>                              | 25   | Failed preemption.                               |
| NON_SELECTED_USER_CLEARING<sup>9+</sup>                      | 26   | Non-selected user clearing.                         |
| DESTINATION_OUT_OF_ORDER                                     | 27   | Destination out of order.                               |
| INVALID_NUMBER_FORMAT                                        | 28   | Invalid number format (incomplete number).                           |
| FACILITY_REJECTED<sup>9+</sup>                               | 29   | Facility rejected.                           |
| RESPONSE_TO_STATUS_ENQUIRY<sup>9+</sup>                      | 30   | Response to status enquiry.                       |
| NORMAL_UNSPECIFIED<sup>9+</sup>                              | 31   | Normal, unspecified.                           |
| NO_CIRCUIT_CHANNEL_AVAILABLE<sup>9+</sup>                    | 34   | No circuit/channel available.                        |
| NETWORK_OUT_OF_ORDER                                         | 38   | Network fault.                               |
| TEMPORARY_FAILURE                                            | 41   | Temporary failure.                               |
| SWITCHING_EQUIPMENT_CONGESTION<sup>9+</sup>                  | 42   | Switching equipment congestion.                           |
| ACCESS_INFORMATION_DISCARDED<sup>9+</sup>                    | 43   | Access information discarded.                         |
| REQUEST_CIRCUIT_CHANNEL_NOT_AVAILABLE<sup>9+</sup>           | 44   | Requested circuit/channel unavailable                  |
| RESOURCES_UNAVAILABLE_UNSPECIFIED<sup>9+</sup>               | 47   | Resources unavailable, unspecified.                       |
| QUALITY_OF_SERVICE_UNAVAILABLE<sup>9+</sup>                  | 49   | QoS unavailable.                         |
| REQUESTED_FACILITY_NOT_SUBSCRIBED<sup>9+</sup>               | 50   | Requested facility not subscribed.                       |
| INCOMING_CALLS_BARRED_WITHIN_THE_CUG<sup>9+</sup>            | 55   | Incoming calls barred within the CUG.                          |
| BEARER_CAPABILITY_NOT_AUTHORIZED<sup>9+</sup>                | 57   | Bearer capability not authorized.                         |
| BEARER_CAPABILITY_NOT_PRESENTLY_AVAILABLE<sup>9+</sup>       | 58   | Bearer capability presently available.                     |
| SERVICE_OR_OPTION_NOT_AVAILABLE_UNSPECIFIED<sup>9+</sup>     | 63   | Service or option not available, unspecified.               |
| BEARER_SERVICE_NOT_IMPLEMENTED<sup>9+</sup>                  | 65   | Bearer service not implemented.                         |
| ACM_EQUALTO_OR_GREATER_THAN_THE_MAXIMUM_VALUE<sup>9+</sup>   | 68   | ACM greater than or equal to the maximum value.                    |
| REQUESTED_FACILITY_NOT_IMPLEMENTED<sup>9+</sup>              | 69   | Requested facility not implemented.                       |
| ONLY_RESTRICTED_DIGITAL_INFO_BEARER_CAPABILITY_IS_AVAILABLE<sup>9+</sup> | 70   | Only restricted digital information capability available.     |
| SERVICE_OR_OPTION_NOT_IMPLEMENTED_UNSPECIFIED<sup>9+</sup>   | 79   | Service or option not implemented, unspecified.               |
| INVALID_TRANSACTION_IDENTIFIER_VALUE<sup>9+</sup>            | 81   | Invalid transaction identifier value.                     |
| USER_NOT_MEMBER_OF_CUG<sup>9+</sup>                          | 87   | User not member of CUG.                        |
| INCOMPATIBLE_DESTINATION<sup>9+</sup>                        | 88   | Incompatible destination.                             |
| INVALID_TRANSIT_NETWORK_SELECTION<sup>9+</sup>               | 91   | Invalid transit network selection.                     |
| SEMANTICALLY_INCORRECT_MESSAGE<sup>9+</sup>                  | 95   | Semantically incorrect message.                         |
| INVALID_MANDATORY_INFORMATION<sup>9+</sup>                   | 96   | Invalid mandatory information.                         |
| MESSAGE_TYPE_NON_EXISTENT_OR_NOT_IMPLEMENTED<sup>9+</sup>    | 97   | Message type non-existent or not implemented.                 |
| MESSAGE_TYPE_NOT_COMPATIBLE_WITH_PROTOCOL_STATE<sup>9+</sup> | 98   | Message type not compatible with protocol state.               |
| INFORMATION_ELEMENT_NON_EXISTENT_OR_NOT_IMPLEMENTED<sup>9+</sup>    | 99   | IE non-existent or not implemented.                |
| CONDITIONAL_IE_ERROR<sup>9+</sup>                            | 100  | Conditional IE error.                             |
| MESSAGE_NOT_COMPATIBLE_WITH_PROTOCOL_STATE<sup>9+</sup>      | 101  | Message not compatible with protocol state.                   |
| RECOVERY_ON_TIMER_EXPIRED<sup>9+</sup>                       | 102  | Recovery on timer expiry.             |
| PROTOCOL_ERROR_UNSPECIFIED<sup>9+</sup>                      | 111  | Protocol error, unspecified.                       |
| INTERWORKING_UNSPECIFIED<sup>9+</sup>                        | 127  | Interworking, unspecified.                           |
| CALL_BARRED<sup>9+</sup>                                     | 240  | Call barred.                             |
| FDN_BLOCKED<sup>9+</sup>                                     | 241  | FDN blocked.                                |
| IMSI_UNKNOWN_IN_VLR<sup>9+</sup>                             | 242  | IMSI unknown in VLR.                        |
| IMEI_NOT_ACCEPTED<sup>9+</sup>                               | 243  | IMEI not accepted.                           |
| DIAL_MODIFIED_TO_USSD<sup>9+</sup>                           | 244  | Dial request modified to USSD request.                         |
| DIAL_MODIFIED_TO_SS<sup>9+</sup>                             | 245  | Dial request modified to SS request.                       |
| DIAL_MODIFIED_TO_DIAL<sup>9+</sup>                           | 246  | Dial request modified to dial with different number.                       |
| RADIO_OFF<sup>9+</sup>                                       | 247  | Radio off.                       |
| OUT_OF_SERVICE<sup>9+</sup>                                  | 248  | Out of service.                               |
| NO_VALID_SIM<sup>9+</sup>                                    | 249  | No valid SIM.                              |
| RADIO_INTERNAL_ERROR<sup>9+</sup>                            | 250  | Radio internal error.                     |
| NETWORK_RESP_TIMEOUT<sup>9+</sup>                            | 251  | Network response timeout.                           |
| NETWORK_REJECT<sup>9+</sup>                                  | 252  | Request rejected by network.                               |
| RADIO_ACCESS_FAILURE<sup>9+</sup>                            | 253  | Radio access failure.                         |
| RADIO_LINK_FAILURE<sup>9+</sup>                              | 254  | Radio link failure.                         |
| RADIO_LINK_LOST<sup>9+</sup>                                 | 255  | Radio link lost.                         |
| RADIO_UPLINK_FAILURE<sup>9+</sup>                            | 256  | Radio uplink failure.                     |
| RADIO_SETUP_FAILURE<sup>9+</sup>                             | 257  | Radio setup failure.                     |
| RADIO_RELEASE_NORMAL<sup>9+</sup>                            | 258  | Radio release normal.                         |
| RADIO_RELEASE_ABNORMAL<sup>9+</sup>                          | 259  | Radio release abnormal.                         |
| ACCESS_CLASS_BLOCKED<sup>9+</sup>                            | 260  | Access class blocked.                           |
| NETWORK_DETACH<sup>9+</sup>                                  | 261  | Network detached.                               |
| INVALID_PARAMETER                                            | 1025 | Invalid parameter.                               |
| SIM_NOT_EXIT                                                 | 1026 | SIM not exit.                            |
| SIM_PIN_NEED                                                 | 1027 | SIM PIN needed.                         |
| CALL_NOT_ALLOW                                               | 1029 | Call not allowed.                             |
| SIM_INVALID                                                  | 1045 | No valid SIM.                              |
| UNKNOWN                                                      | 1279 | Unknown reason.                               |

## MmiCodeResults<sup>9+</sup>

Defines the MMI code result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name   | Type                            | Mandatory| Description           |
| ------- | -------------------------------- | ---- | --------------- |
| result  | [MmiCodeResult](#mmicoderesult9) | Yes  | MMI code result.|
| message | string                           | Yes  | MMI code message.|

## MmiCodeResult<sup>9+</sup>

Defines the MMI code result.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name            | Value  | Description         |
| ---------------- | ---- | ------------- |
| MMI_CODE_SUCCESS | 0    | Success.|
| MMI_CODE_FAILED  | 1    | Failure.|

## AudioDeviceOptions<sup>9+</sup>

Defines audio device options.

**System API**: This is a system API.

**System capability**: SystemCapability.Telephony.CallManager

| Name            | Type  | Mandatory| Description    |
| ---------------- | ------ | ---- | -------- |
| bluetoothAddress | string | No  | Bluetooth address.|