Why not try T-Mobile test drive.In 15.5 years this is the first device I have ever owned with a SIM card on Sprint and it's the first device we have ever asked for an unlock on. So, this is the very first time all the way around.
I will give it 5 days then. My problem is that I want to go to T-Mobile, but I know of no one that has a T-Mobile SIM to test. I thought about buying some crap prepaid phone with a SIM on T-Mobile just to test a SIM, but if it costs me more than $40 or so I'm not in a spot to afford that at the moment.
I know someone at work who has Verizon and an iPhone 5 so I might ask there to try it, but that's rather a delicate situation. I also thought I might ask a T-Mobile rep at a store if they'd let me try a SIM to see, but I don't know if that's doable or not.
Asking questions at this point.
http://explore.t-mobile.com/test-drive-free-trial