1. Find "Settings"
Press the phone icon.
Press the menu icon.
2. Activate or deactivate WiFi Calling
Press Wi-Fi Calling.
Press the required SIM.
Press the required setting to activate or deactivate the function.
When WiFi Calling is active, the WiFi Calling icon is displayed.
3. Return to the Home screen
Press the home icon to end the session and return to the Home screen.