Telephony Service Overview

The Telephony subsystem provides a series of APIs for making calls, obtaining current cellular network signal information and managing SIM cards.

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.

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.

Constraints

The accommodating device must be equipped with a modem and a SIM card capable of independent cellular communication.