I sold my iPhone 6 plus a few months ago to go to the LG G4. I sold my old iPhone 6 plus and upgraded with Next. I am looking at buying a new iPhone 6 Plus on eBay. My questions are 1. can I sell my phone with no problems even though I financed it on next? And 2. If the phone I buy was financed on next and the seller stops making payments, will the phone get blacklisted and I'll be SOL? I know T-mobile does this from the threads I've read, but I can't find any concrete information about AT&T.