OPPO A78 5G
Android 13
1 Find "Call barring"
Press the call icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press Operator-related settings.
Press Call barring.
2 Turn call barring on or off
Press the required barring type.
Key in your barring password. The default barring password is 0000.
0000
3 Return to the home screen
Press the Home key to return to the home screen.