Thank you.It covers both CDMA and GSM from what I can see, so it should work on AT&T. But bring it to an AT&T company store (not an associate store) first and see if they'll put one of their activated SIMs into it, to make sure. It's listed as 3G CDMA, and AT&T has voice and text on 3G now, so I'm a little unsure at this point. A few minutes in a store will tell the story.