iPhone 3GS won't get any service!

[MasterChief]

I have always had service outside of my house but now I don't! I've tried resetting the phone by pressing both buttons. It still wont pick up any service! What do I do?

Thanks!

 

[Moi un Mouton]

See if another AT&T phone gets service in the same place. If yes then call Apple, otherwise call AT&T.