I know this is a niche question, but I thought one of you lovely people may have the answer. Initially, I wanted to get a T-Mobile phone on the iPhone Upgrade Program. Sadly, Apple only had AT&T phones, so I bought one at full price unlocked and am now using it on T-Mobile. Awesome! So fun! The thing is, I would way rather be on the Upgrade Program (insurance included, no need to find a seller next year...) The main issue is that the IMEI is still registered to AT&T, otherwise I would go to Apple and ask to "return and repurchase" this phone using IUP. I had heard T-Mobile could transfer this IMEI to their ownership now that I was using it with them, but when I called, the representative and her supervisor knew nothing about that. Have any of you had luck transferring the ownership of an IMEI? How do I do it?