He still had to sign a contract when he opened his AT&T account. That contract incorporated the AT&T TOS, which specifies that iPhones cannot be used on an account without the appropriate data plan. That clause is in every AT&T contract, not just ones started with the purchase of an iPhone.
I do use the AT&T network, yes. That means a few years ago I did sign a contract and agreed to their terms of service. But I seriously doubt anything about the Iphone was on there way back then?
I just want to know if they can legally do this, and if anyone has ever seen this email? Thanks!