If you are transferring your number from another service it could take up to 6 hours even if you aren't transferring it could take almost one day. It does suck cause you can't even use your IPOD either. Just wait it out.
i'm not changing numbers or anything. I'm really worried about the fact my iphone says no service. Could that cause a problem with activation?
Although, when i try and ring the number i've been given. It says that the number has not been recognized.
I think the phone has to have cell service to activate. This has been an issue a couple of times. Best to call AT&T if it doesn't activate after a day (or sooner if you want).