I actually had the JB OTA installed, but forgot to run Rootkeeper before I did the upgrade. Couldn't get the new root exploit involving Smart Tasks to take. So, I tried running Droid Razr Utility 18 to start over from a rooted stock ICS base. This ran as expected EXCEPT these lines: Writing 'boot'...INFOPreflash validation failure FAILED (remote) Now my XT912 phone is truly bricked. Won't boot at all. I've tried every "erase" or "clear" option that I could find in Recovery, but I can't clear whatever it is that is making the validation fail. I'm in way over my head here and I sure could use some help with what to do next. The phone is on contract 'til May '14, so I sure would like to get it working again. Help!! Thanks!