I'm with T-Mobile but the Apple store did not get ANY T-Mobile 6 Plus, and they were sold out of the Verizon (unlocked GSM) ones in the color I want, so I got a reservation for an AT&T iPhone 6 Plus and I will pay the full price upfront no contract. I searched around the forum a little bit and got a little confused, since there are two stories going around. 1. Any AT&T iPhone purchased from the Apple store full price are unlocked. 2. The AT&T iPhone, even purchased full price from Apple, are still locked but can be unlocked through AT&T website. Does anyone know which of these two claims are correct?