Open Messaging
.
Select Options > Settings > Text message > Message centers.
Scroll to a message centre and select Open. Scroll to a message center and press the scroll key.
Select a message center from the list.
Enter the desired changes to the name or number of the center. To save your changes, select Back.
Message centers may be preset in your device by your service provider, and you may not be able to create, edit, or delete them.