1-IMEI of youre MOTOROLA ATRIX 4G
2- call costumer support of AT&T 1-877-737-2478 the option you will need is "0"
3- just ask about the free unlock codes they are giving for the phone
4- wait a couple of minutes.
5- if they give you the code enter it in youre phone
6- cross youre fingers
in case they wont help you i guess you just have to call back i guess they have like more than 100+ employees so youre bound to bump with someone who is willing to give it to you... you DONT need to be an AT&T exclusive customer just ask kindly what you need and theyl help you .
ENJOY!!!! please like this post and sticky it since its my first real usefull post here at XDA.
PS: I dont know if this post is already made but i checked more than 20 post people asking questions so ths thread is more of a solution sorry if i broke a law or something just mail me if i need to mod something cheers... and enjoy youre phone!!!!!
PS: PS for you who are asking i live in DOMINICAN REPUBLIC and my SIM carrier is CLARO RD and i called from skype to have no cost at all so i guess there are no restrictions when it comes to unlocking youre phone .