AOSP. Now it seems that Google has released some updated code in the form of the newly tagged android-4.2.1_r1.1 and android-4.2.1_r1.2.

The first file, r1.1, is build JOP40F and r1.2 shows itself as build JOP40G. For those that think JOP40G sounds familiar, that’s because it was previously believed that this build might show up with Android 4.2.2