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 your Atrix 4G phone to your Windows computer via USB cable then download the Atrix4groot.zip here:
Unzip the file and install the RSD drivers.
For Windows 32-bit systems, run Handset_USB_Driver_32_v4.9.0.msi and Windows 64-bit systems, run Handset_USB_Driver_64_v4.9.0.msi.
Once the drivers have been installed, you can verify in Device Manager and see “Motorola Flash Interface”.
Next run RSDLite5.3.1.msi to install RSDLite software.
When that’s completed, you can run the RSDLite program, then choose preinstall.sbf as Filename and hit Start to begin.
When that’s all completed, your Atrix 4G will reboot by itself, now goto Settings->Applications->Development and make sure USB Debugging is checked on.
Download the adb.zip file here and unzip to the root folder of your hard disk.
Open up a command prompt then browse to your adb directory by typing:
Then type the following:
/preinstall/dosu /bin/mount -o remount,rw /system cp /preinstall/su /system/bin/ chmod 6755 /system/bin/su PATH=/system/bin:$PATH pm install /preinstall/Superuser.apk
Go back to your phone and you can now see that you have Superuser app installed and have root. That’s it!