So does this root work for ota jelly bean?
Sent from Razr MAXX HD
Yes, but you have to do it in the right order. First you use the utility here
DROID RAZR HD Utility 1.10 -- For Verizon XT926 Models [Windows] - Droid Razr HD - RootzWiki to go back to factory ICS. For the utility to work, you have to have USB debugging activated in the phone's Developer Options, and be booted into fastboot mode (when the phone is off, hold down power, volume up, and volume down simultaneously to get to the menu, then use the volume key to scroll down to fastboot, then press volume up to select).
After you're back to factory 4.0.4, you install the 7.2 OTA security update to your phone the normal way. This is the little update that came out shortly after the phone was released, and you'll still be on 4.0.4
Then you use the utility to root, and use the utility to install Rootkeeper. That will also install the Superuser app. Not sure if you still have to do this, but open the Superuser app, scroll over to the screen that has the binaries, and tap the binaries to prompt it to update.
Do "Protect Root" or whatever it's called in Rootkeeper. Then do the temporary un-root in Rootkeeper.
Then you can do the Jelly Bean OTA update. After the update is done, you can use Rootkeeper to restore the root.
This worked for me, and that's all the steps as far as I can recall. By the way, I don't really know what I'm doing, I was just able to follow the steps, so I probably won't be of much help if it doesn't work.