You need 850 and 1900 wcdma bands for att in the us. I'm using them now on my mi2. T-Mobile uses 1700 and 2100 bands but has started rolling out 1900 MHz in a few places. So if you don't have 1900 MHz you'll be stuck on slow edge. Works perfect on att for me though.
Sent from my MI 2 using Tapatalk 4
I'm using Mi2 on AT&T right now but I wanted to check if Mi3 changed basebands. So it will work for my AT&T but not for my friend's T-Mobile?
Thanks for your help.