In order to get the iPhone last year, I switched from my family's Sprint family plan to my grandparent's AT&T family plan. I'm 17 years old, and the law prohibits me from getting a plan under my own name until I turn 18. My question is, a friend and I are planning on going to get the new iPhone on July 11th... but obviously, the account isn't in my name... AND I'm a minor.... Will AT&T allow me to sign the new two year contract? Or will my grandpa have to come with me? (He lives 2 1/2 hours away and that really wouldn't be too convenient.)