Find "Call forwarding"
Press the menu icon.

Press Settings.

Press Call settings.

Press Call forwarding.

Select divert type
After a moment the current settings are displayed.

Press one of the following options:
Always forward
Always forward

Forward when busy

Forward when unanswer

Forward when unreachab

Cancel divert
Press Disable.
The request is sent.
The request is sent.

Exit
Press the Home key to return to standby mode.
