I have problems receiving voice calls on my Samsung Galaxy A12

Press the phone icon.

Press the menu icon.

Press Settings.

Press Supplementary services.

Press Call forwarding below the required SIM.

Press Voice call.

Press the required divert type.

901

901

Key in 901 and press Enable.

Press the Home key to return to the home screen.

Press the phone icon.

Press the menu icon.

Press Settings.

Press Supplementary services.

Press Call forwarding below the required SIM.

Press Voice call.

Press the required divert type.

Press Disable.

Press the Home key to return to the home screen.

Press the Side key.

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

Press the phone icon.

Press the menu icon.

Press Settings.

Press Supplementary services.

Press Call barring below the required SIM.

Press Voice call.

Press the indicator next to the required barring type to turn the function on or off.

Key in your barring password and press OK.

Press the Home key to return to the home screen.