SMSC with Samsung SGH-t456?

[AisuuKuriimu]

I can't change my service centre number in the text messaging settings... I know the number, but it won't let me type it in.

If I don't have a number in here then I'm going to have to type in the service centre number every time I send a text, which will bug the hell out of me! Someone help?

 

[Unregistered]

I have the same problem !!
did you figure out how to fix it ?

 

[Unregistered]

Same problem, try resetting the phone?