I have an iPad 2 with AT&T cellular service which I have never activated. It used to say AT&T in the top left corner, but I disabled the cellular service under Settings because I would get popups asking me to create an AT&T account which I did not want to do. Anyway I recently upgraded the iPad to iOS 7 and noticed that it now says No Service in the top left corner, and that under settings the cellular setting is now enabled. So my question is, is there a problem, or did iOS 7 change what it says? Why did it say AT&T in iOS 6 but in iOS 7 it says No Service? I read to reset network settings and toggle the airplane mode but when I do that it searches for a moment and then goes back to No Service. I also took out the SIM card and put it back but no change. Any help is apreciated.