I have a droid razr maxx runnning Android 4.0.4. Somewhere along the way, it appears the phone got rooted (I didn't do it on purpose) and I'm unable to install any OTA updates. I also tried the instructions above (starting with class 3) without success. I don't really need the update but I'm starting to get annoyed by the install prompts. Any help is greatly appreciated. Cheers.
All others options aren't really needed if you don't need root or dont want to flash ROMs
DROID RAZR Utility XT912 Jellybean -- Windows + Mac + Linux (All In One!)