Excellent news for unlocked Galaxy Nexus and Nexus 7 owners like myself who enjoy the pleasures of fiddling with those respective devices. The Google Development team has officially released the official Android 4.1.2 build JZO54K factory images for the unlocked Galaxy Nexus (“takju”) and the Nexus 7, respectively. This means that should you happen to take your general tomfoolery too far and create an “oopsies”, you’ll be able to restore the device back to normal as if nothing ever happened. And who wouldn’t want the ability to bring their device back to its original state?
Full details and links to the factory images are available once you hit the source link below.
source: Google Developers
Well what do we have here? Newly available factory images for Android 4.0.4 (IMM76I) can now be obtained via the web for all yakju variants of the GSM version Galaxy Nexus. In addition, there’s a new build on the horizon, “takju”. These images are highly coveted as they can assist you in a time of need, such as when you brick the heck out of your phone rendering it useless. The images can also help you move from a non-yakju build to a yakju one seamlessly. You’ll need fastboot of course and some experience flashing images can’t hurt either. Also note that as Google has begun selling their Nexus device on the Play Store, recall that this is not the same model, it’s the takju build. Takju is Android 4.0.4 (IMM76I) with some optimization for supporting Google Wallet.
source: Google Dev Site