-Will work for the devices that when you check on ATT website showing "Looks like the IMEI number you entered doesn’t match an AT&T device. Try entering it again. Dial *#06# on your mobile phone to make sure you have the right IMEI." And you know is AT&T either because was bought from AT&T or has att branding on it. The phone must be clean and out of contract to work .
-Supports popular models like: