I tried to swap my 64 gb 6s plus for a 128 today, but ran into problems. I had to use AT&T's premiere Dept, since I'm doing a 2 year contract, but no one could help me there. Not only could 3 people not make the exchange happen due to technical problems on their end, but even the manager said that even though all I'm doing is exchanging the phone, the whole contract starts over from a new date. This would mean I couldn't pre-order again in 2 years since I'd still be under contract. I couldn't believe there wasn't some way they could fix that problem. I decided to just keep my phone. Good thing I didn't get a 16gb phone. I thought I read about someone saying the person they were able to get a similar issue resolved. Does anyone know of a way to exchange my phone and still be able to preorder in 2 years time? Thanks!