1. 1. Find "Wi-Fi Calling"
Press Wi-Fi Calling.
2. 2. Turn Wi-Fi calling on or off
Press the indicator next to "Wi-Fi Calling on This iPhone" to turn the function on or off.
If you turn on the function, press Enable.
When Wi-Fi calling is active, the text "Wi-Fi" is displayed next to the name of your operator.
3. 3. Return to the home screen
Press the Home key to return to the home screen.