Samsung Galaxy A12
Turn call barring on or off
You can block certain types of calls such as incoming calls when you're abroad.
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. The default barring password is 0000.
Press the Home key to return to the home screen.
1. 1. Find "Voice call"
2. 2. Turn call barring on or off
3. 3. Return to the home screen