Find "Msg. centre number"
Press the Navigation key.
Scroll to Messaging and press the Navigation key.
Press Options.
Scroll to Message settings and press the Navigation key.
Scroll to Text messages and press the Navigation key.
Scroll to Msg. centre number and press the Navigation key.
Enter the message centre number
Key in +35387699989 and press the Navigation key.
Return to the home screen
Press Disconnect to return to the home screen.