Don't go back to gb. You could brick your phone. 214 was a leak that came out before 211 and 215.
Your best bet is to go back to .211 if you want to be on the JB upgrade path it to go to .215.
Read through these steps, instructions, & threads...
http://www.droidforums.net/forum/droid-razr-support/217843-mattyps-215-leak-classroom.html
Going back to stock .211:
*On your pc, download and install Matt's Razr Utility 1.8 or 1.81 or 1.82. You can find 1.82 here:
Droid Razr Utility 1.82 [Windows] For Verizon Droid Razr And Droid Razr Maxx Only - DroidRzr.com
*Extract that utility to its own folder on your computer...you must extract the file on your pc. It will not work from your phone.
*After the utility is extracted, go to the Motorola drivers folder in the utility and make sure you have the latest Motorola drivers installed on your pc.
*make sure your phone is set to usb debugging mode (menu>system setting>developer options).
*Power your phone off. Then power your phone on while holding down your power, the volume up and volume down buttons simultaneously.
*Connect your phone to your computer with the factory supplied usb cable.
*On your phone select AP Fastboot, then in the utility select option 1..."restore phone to stock .211. Do not unplug the usb cable until the utility finishes.
*When completed your phone should reboot to stock .211.
*After running option 1, restart phone to make sure all is fine.
Install the .215 leak:
*check to make sure usb debugging mode is checked (menu-> system setting-> developer options).
*Then in settings, go to “Security" and check “Unknown sources."
*install the .215 leak following instructions here:
http://www.droidforums.net/forum/droid-razr-support/217843-mattyps-215-leak-classroom.html
Root your og Razr or Razr Maxx:
*Simple step by step instructions for rooting using Mattlgroff's utility (use the same utility that you used to go back to stock) can be found on post #89 here:
http://www.droidforums.net/forum/droid-razr-hacks/216562-droid-razr-utility-1-8-a-9.html
*If you plan on installing roms, install safestrap instead of bootstrap.
Safestrap:
*Once safestrap is installed, follow the steps in quidot's thread to prepare safestrap's safe and non-safe side so you are ready for those roms...
http://www.droidforums.net/forum/droid-razr-hacks/200942-safestrap-guide-razr.html
Sent from my XT907 using Droid Forums