I bought mine from Samsung.com and noticed that it says "Unlocked by Samsung" on the box. I don't know if that means the device isn't actually a Tmobile unit though. Anyways, Samsung Pay doesn't work for me. When I install it from Okay I Store, it says this device isn't compatible. When I install it from the Galaxy App store, it tells me a new update is available and the new features are "Brand new UX" and when I press OK, it just closes the app. Is it just because the phone isn't officially released yet or is it a software issue? Thanks.