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If you can't answer your incoming calls, you can divert them to another number.
1. Find "Call forwarding"
Slide two fingers downwards starting from the top the screen.
Press the settings icon.
Press Call forwarding.
2. Divert calls to alternative number
Press the required divert type.
Key in the required number and press ENABLE.
3. Return to the home screen
Press the Home key to return to the home screen.