My family is going to sign up for a family plan through AT&T near the end of August. The plan should consist of just three people (parent, sibling, and I), but my sibling and I want to wait for the iPhone 5 (rumored to release on Oct. 7). What can we do to make this happen? Possibly buy the iPhone 4, then return it on the pre-order date? Is it possible for just one person to start the family plan, and then have us added onto the plan once the release or preorder of the ip5 occurs? Give me some feasible scenarios. Thanks!