After making the Android 4.4 KitKat update available for various Nexus devices including the Wi-Fi versions of the Nexus 7 (2012 and 2013 models) and Nexus 10, Google has posted KitKat factory images for all its Nexus handsets and tablets.
The official over-the-air (OTA) downloads may not be available for certain devices, including the Nexus 4 and the cellular versions of the two Nexus 7 models, but their respective factory images are available, which means users can manually install the updates themselves...
Read the full story here... Source: Android Authority