Warning: Don’t use for new Atrix 4G with 4.5.91 update! For those of you wondering how to root your Atrix 4G, here’s an easier way over the older method we posted earlier.
This will work on any version of Atrix 4G on AT&T. (not tested with other carriers)
First, put your Atrix 4G into RSD mode by turning off your phone then holding down the Power Button WHILE HOLDING DOWN Volume Up button and you can let go of both buttons when you see a screen like this:
Next, connect y