Find "Call barring"
Press Applications.
Press Settings.
Press Voice call.
Press Call barring.
Cancel all call barrings
Press one of the following barring types to deactivate it:
All outgoing calls
All outgoing calls
Outgoing international ca
International calls excep
All incoming calls
Incoming when roaming
Key in the barring password (default is 0000) and press OK.
When the box next to the menu item is empty, call barring is deactivated.
Repeat until all call barrings have been deactivated.
Repeat until all call barrings have been deactivated.
Exit
Press the Home key to return to standby mode.