If you have the unlimited data plan now, and you simply swap sim cards when you get a new iPad, how does AT&T know (or care) that you did so? Your account remains unchanged.
OK fine, but what about selling to a 3rd party?
I might sell my iPad with the unlimited data plan to someone else. It;s great selling point, as I don't really use that much data, but didn't want to lose it so I kept it for a year.
anyone know?