Ok this hasn't happened to me, and If it does I'll take it to court. BUT I've read that some people who didn't purchase an iPhone directly from ATNT OR Apple but put in their sim to an unlocked iPhone get some text message from AT&T forcing them to upgrade to the iPhone data plan. Is this true? Why would they force you to do that? they didn't pay for the phone! They shouldn't worry about it either! I would cause a monster fit with AT&T if this were to happen to me. But it just drives me insane that they do that to people.