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If you can't answer your incoming calls, you can divert them to another number.
1. Find "Additional settings"
Press the phone icon.
Press the menu icon.
Press Additional settings.
2. Divert calls to alternative number
Press Call forwarding.
Press Voice call.
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.