Ok so I have confirmed that the Verizon iPhone 5 comes factory unlocked. If I upgrade to the iPhone 5 from my old phone, can I use the iPhone 5 on Tmobile? In other words, once I start a new 2 year contract, can I go back to my old phone without paying the termination fee?
Some say you can, some say you can't but if you go to T-Mobile's website and look at the info for their Sim only plans for the iPhone you will see that they clearly state that only the AT&T iPhone will work with them. This may have something to do with the bands they use. You can try contacting T-Mobile directly to make sure.