I'm almost 100% certain that my parents will buy me an iPhone. My parents and I are currently with T-Mobile and will switch for the iPhone 4G/HD/whatever it's called. But I was browsing around AT&T's site and it seems you need to pay $30 for each iPhone's data plan on a family plan. Basically, if I wanted 3 iPhones in one family plan, then I would have to pay $90 a month for the data plan for all 3. Is this true?