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You can block certain types of calls such as incoming calls when you're abroad.
1. Find "Call Barring"
Press the main menu icon.
Press the menu icon.
Press Call Barring.
2. Turn on call barring
Press the required barring type.
Key in your barring password and press OK. The default barring password is 0000.
3. Return to the home screen
Press the Home key to return to the home screen.