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If you have problems receiving voice calls, there may be several causes of the problem.
Press Tools.
Press Dialler.
Press the menu icon.
Press Settings.
Press Call forwarding.
Press the required divert type.
Key in 901 and press ENABLE.
Press the Home key to return to the home screen.
Press DISABLE.
Press and hold On/Off until your tablet restarts.
Press Call barring.
Press the indicator next to the required barring type to turn the function on or off.
Key in your barring password and press OK.