To add or edit text message centres, open Messaging
and select Options > Settings > Text message > Message centres.
If you change your SIM card, the list of available text message centres is updated to the ones on the new SIM card.
To add message centres, select Options > New message centre.
To edit a message centre, scroll to it and select Change.
To edit a message centre, scroll to it and press the scroll key.
To delete a message centre, scroll to it and press C.
Message centres may be preset in your device by your service provider, and you may not be able to create, edit, or delete them.