Back in late November of 2012, Google published Android 4.2.1 factory image for the Nexus 4 handset. But, due to some unspecified reasons, Google has removed all Nexus 4’s accompanying files from Nexus Device Factory Images website, and Jean-Baptiste Quéru from Android Building team couldn’t give an explanation on whatever issue that let Google from removing them.
Good to see that Android 4.2.1 factory image for Nexus 4 handset is now returned to Google’s developer website for your downloading pleasure.
You can download the Nexus 4 Android 4.2.1factory image “occam” form the below link. Its build number JOP40D remains unchanged.
Source: Nexus Factory Images Page