Samsung B2710
1 Find "Text messages"
Press Menu.
Scroll to Messages and press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to Text messages and press the Navigation key.
2 Save the message centre number
Scroll to Service centre and press the Navigation key.
Key in +6421600600 and press the Navigation key.
3 Return to the home screen
Press Disconnect to return to the home screen.