Samsung Galaxy S20 5G
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Turning 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.
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.