I have problems receiving voice calls on my Google Pixel 3 XL

Press the phone icon.

Press the menu icon.

Press Settings.

Press Calls.

Press Call forwarding.

Press the required divert type.

901

901

Key in 901 and press TURN ON.

Press the Home key to return to the home screen.

Press the phone icon.

Press the menu icon.

Press Settings.

Press Calls.

Press Call forwarding.

Press the required divert type.

Press TURN OFF.

Press the Home key to return to the home screen.

Press and hold On/Off.

Simultaneously, press and hold the lower part of the Volume key until your phone restarts.