Link thanks to wardcst
Manually install without root..
1. Download an place in external storage
2. Have your phone charged at least 70% (just in case)
3.Boot into stock recovery (turning off the phone and turning ...
I do not know if this has been posted already but there is root for Droid Razr running 4.1.2
Here : http://www.droidrzr.com/index.php/topic/6924-root-achieved-for-jb-ota-razrmaxx-xt912/
Sent from my DROID RAZR using xda app-developers ...
You can try using matts utility 1.82 doing Option #1
Also when you get the android with the triangle , press volum...
Sent from my DROID RAZR using xda app-developers app