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!4559 【OpenHarmony开源贡献者计划2022】telephony-overview.md.相关格式及表达问题

Merge pull request !4559 from king_he/0528-d
...@@ -4,11 +4,9 @@ The Telephony subsystem provides a series of APIs for [making calls](../referenc ...@@ -4,11 +4,9 @@ The Telephony subsystem provides a series of APIs for [making calls](../referenc
Your application can call related APIs to obtain the name of the currently registered network, network service status, signal strength, and SIM card information. For details, see [Obtaining Current Cellular Network Signal Information](cellular-network-signal-info.md). Your application can call related APIs to obtain the name of the currently registered network, network service status, signal strength, and SIM card information. For details, see [Obtaining Current Cellular Network Signal Information](cellular-network-signal-info.md).
To make calls, your application needs to declear the **ohos.permission.PLACE_CALL** permission. It is recommended that the application use **makeCall()** to redirect users to the dial screen and display the dialed number. For details, see [Redirecting to the Dial Screen](jumping-to-the-dial-screen.md). To make calls, your application needs to declare the **ohos.permission.PLACE_CALL** permission. It is recommended that the application use **makeCall()** to redirect users to the dial screen and display the dialed number. For details, see [Redirecting to the Dial Screen](jumping-to-the-dial-screen.md).
## Constraints ## Constraints
The accommodating device must be equipped with the following hardware: The accommodating device must be equipped with a modem and a SIM card capable of independent cellular communication.
A modem and a SIM card capable of independent cellular communication.
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