I just converted today from AT&T to T-Mobile. My wife and I have unlocked iPhones (both originally AT&T, but they granted unlocks for us). Both are on iOS 7.1.
So far, for some reason, I get 4G/LTE all the time in our house on my 5s. But her 5 is getting E almost all the time, even when side by side. I do have unlimited on my plan and she has 2.5 GB, but both should be full speed since we haven't even had T-Mobile for 12 hours yet, right?
in april last year, the gsm iphone 5 was was updated to support all of t-mobile's 4g aws bands. is it possible you have one of these updated models while your wife does not?
Very well could be. I wasn't aware. The 64gb iPhone 5 that she has was a hand me down from me. I originally got it on the iPhone 5 launch day in Sept 2012.
My 5s is from Sept 2013 so I'm assume it's the most versatile for supporting all bands, correct (even if originally on AT&T)?
That is exactly the problem. The launch day iphone 5 does not support all of the tmobile bands.
http://www.tmonews.com/2013/03/appl...bands-existing-devices-wont-have-aws-support/