My family is switching to AT&T. I want to get us a family plan, however I want an iPhone, and the rest of my family to have regular phones. I heard that this was possible, but you have to order regular phones first, then order an iPhone and activate it, and it only costs the extra $20 a month for the data plan. Is this true? Can I do this? If so, how do I activate my iPhone and make that my phone rather then the other phone I got from AT&T? Thanks!