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If you have problems receiving voice calls, there may be several causes of the problem.
Press the phone icon.
Press Keypad.
Key in **21*901# and press the call icon.
Key in **61*901*20# and press the call icon.
Key in the required number of seconds before the call is diverted, e.g. 20. The number needs to be divisible by 5.
Key in **62*901# and press the call icon.
Key in **67*901# and press the call icon.
Press Dismiss.
Press the Home key to return to the home screen.
Key in ##002# and press the call icon.
Press the Top volume key.
Press the Bottom volume key.
Press and hold On/Off until your phone restarts.