!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

en/application-dev/telephony/telephony-overview.md

@@ -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).
 
-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
 
-The accommodating device must be equipped with the following hardware:
-
- A modem and a SIM card capable of independent cellular communication.
+The accommodating device must be equipped with a modem and a SIM card capable of independent cellular communication.