Switch from ATT to TMobile

[iMore Question]

I want to switch from ATT to TMobile. I a due an upgrade on ATT and could purchase a subsided iPhone 6 with them when it comes out, but am not sure how I would switch to TMobile at that point. What is the best route to a new iPhone 6 and TMobile?

Thanks

 

[EmceeGeek]

If you pay for the phone at a subsidized price and upgrade you'll have to have AT&T unlock the phone for you and you'll also be paying the etf (early termination fee) but right now T-Mobile is paying it if you move your line over. Now if you want to buy a phone from T-Mobile, the preorders start this Friday.