Sony Xperia 10 III
Android 11.0
1 Find "Wi-Fi Calling"
Press the phone icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press the name of the SIM.
Press Wi-Fi Calling.
2 Turn Wi-Fi calling on or off
Press the indicator to turn the function on or off.
3 Return to the home screen
Press the Home key to return to the home screen.