Find "Voice call"
Press Apps.
Press Phone.
Press the Menu key.
Press Call settings.
Press Call forwarding.
Press Voice call.
Cancel all diverts
After a moment the current settings are displayed.
Press one of the following options:
Always forward
Always forward
Forward when busy
Forward when unanswered
Forward when unreachable
Press Disable.
Repeat until all diverts have been cancelled.
Repeat until all diverts have been cancelled.
Exit
Press the Home key to return to standby mode.