New to iPhone and AT&T questions....

I have a few questions. I activated my phone via iTunes and all went fine. Seemed to activate in a very short time. I can make calls, surf the net, download/upgrade apps, check email... But when I try to register Applecare, it says I must activate my phone 1st. Also when I tried to use an app( most are working) I got a message that I need to activate the phone. Am I activated? Is there a final step I need to do? Should I just call AT&T?

Posted this in the activation thread, but no responses