i currently have t-mobile, and have had the one s since the day it hit the shelves. i absolutely love the phone, but i've recently moved to a rural area, and t-mobile service is a joke out there. a buddy of mine right down the street has at&t, and has perfect signal, plus they offer the one x... the one i wanted from the get go. kind of a no brainer. i don't really have any questions as of yet, since the one s and x are basically the same (from an operations standpoint). just wanted to say hi, and that i'll be browsing here a bit... oh, and i'm pretty excited to have a bigger better display. lol.