1. Find "Call barring"
Press the phone icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press the required SIM.
Press GSM call settings.
Press Call barring.
2. Turn call barring on or off
Press the required barring type.
Key in your barring password and press TURN ON. The default barring password is 0000.
0000
3. Return to the home screen
Press the Home key to return to the home screen.