Motorola said that the DROID Razr M, HD and Maxx HD would all get updated to Jelly Bean before the end of 2012. Last night an official leaked build of Jelly Bean showed up online and it seems that the RAZR M will be the first handset to get the update.
Official Motorola DROID RAZR M Jelly Bean update leaked early
News of the update came from a thread on XDA, however there is no feedback in it at the moment, so you might want to wait as you could flash a buggy build. Of course anyone considering downloading and installing the update should be aware that this may not be the final build and if you flash you’ll have trouble getting the official update if it were to roll out this month.
Nevertheless if you are game then the folks over at AndroidPolice have the files and the instruction (at bottom). As AP explains, “all you need to do is download the file, rename it to update.zip, drop it onto the root of the SD card, reboot into recovery, and select “install update.zip.”
The source adds that the update process is pretty long so be patient and possibly have a charger handy. Once it’s completed, just reboot and you Motorola DROID RAZR M is on Android Jelly Bean.