1. Find "Wi-Fi Calling"
Slide your finger downwards on the display.
Press the settings icon.
Press SIM Card & Mobile Data.
Press the name of the SIM.
Press Wi-Fi Calling.
2. Activate or deactivate WiFi Calling
Press the indicator next to "Wi-Fi Calling" to activate or deactivate the function.
Press Wi-Fi Calling Preferences.
Press the required setting.
3. Return to the Home screen
Press the home icon to end the session and return to the Home screen.