Why can't I enroll on the Apple's iPhone upgrade program with Tmobile as my carrier online in the Apple website? Why do I have to go to an Apple Store and check in with a specialist?
It’s because T-Mobile’s back end system to confirm your account is crap. You can buy a full price phone to get your hands on one then return to a store and rebuy under iUP. Once you’re in, you can do upgrades online.