Samsung Galaxy Tab 7.7
1 Find "Call forwarding"
Press Apps.
Press Settings.
Press Call.
Press Call forwarding.
2 Select divert type
The current settings are displayed.
Press one of the following options:
Always forward
Always forward
Forward when busy
Forward when unanswered
Forward when unreachable
3 Divert calls to voicemail
Key in 707 and press Enable.
4 Exit
Press the home icon to return to standby mode.