Root your Atrix with GladRoot v4.2 on AT&T 1.83
Before you begin your phone must be rooted previously using GladRoot and phone must be running 4.1.57.
If you aren’t rooted and already updated to 4.1.57 or 4.1.83
1. If you have already updated your phone to 4.1.83 and its not previously rooted using GladRoot please follow these instructions to get your phone back to stock so that you can flash your firmware back to 4.1.26.
If you are Running firmware 4.1.26
2. After you have flashed back please follow these instructions to root your phone using GladRoot and then update to 4.1.57.
If you are running firmware 4.1.57 and currently rooted using GladRoot
3. All you have to do once your Atrix has firmware version 4.1.57 and rooted is update your phone to 4.1.83 and run the afterupdate.bat in your Gladroot folder again.
Your all done (yes its that easy)
As always this article is here for informational purposes and Android Advice cannot be held responsible for any damage to your phone. Rooting your phone is against your TOS and while we do not condone this we want you to be informed.