Hi, Just wondering if this is allowed as my friend got a new iphone using an upgrade eligibility option from a family member. My wife has iPhone 4 and is basically uses the phone for facebook, text messgaging and email. She is not into the whiz bang of the new phones. In fact, we've been asking her to upgrade her phone for several years since her upgrade eligibility was with the iPhone 5. She's on a ATT family plan and I am on a separate ATT personal plan with my 5s that I got a year ago. Is there anyway to use her upgrade to get the iPhone 6 and then swap the SIM/service on my 5s for her iphone 6?