Google has rolled out an incremental update bumping the recently released Android 4.2 (Jelly Bean) software to Android 4.2.1, following information about the December bug and Bluetooth issues. The update, of 1.1MB size, is available as an over-the-air (OTA) update and accessible by navigating to Settings > About Phone > System Updates.
However, in case a manual download is required, Nexus 4 users may refer this guide. IBTimes UK cautions users it will not be held responsible for any damage to the device during installation. This guide is compatible only with the international variant of the LG Nexus 4; to check the device model, browse to Settings > About Phone.
To Install Android 4.2.1 on LG Nexus 4:
- Download latest version of the Android SDK and install programme on the computer
- Download the Android 4.2.1 OTA update file
- Turn device off and reboot by holding Volume Up and Volume Down buttons during boot-up process. Once fastboot menu appears and Start, press Volume Up to navigate to Recovery and then press the Power button. Press Volume Up and Power buttons once you see an Android symbol with a red exclamation point icon. Now, head to and select Apply Update from adb
- Connect device to PC using USB cable
- Open command prompt in the same directory where the update file is placed (to do so, navigate to the folder that contains the update file and right click on the folder. Now, choose Open Command Window Here)
- Type the following command - adb sideload 625f5f7c6524.signed-occam-JOP40D-from-JOP40C.625f5f7c.zip
- A progress bar, detailing installation updates, should appear on the device's screen. Once it reaches 100 percent, unplug the device from the PC and wait for the device to boot-up
The LG Nexus 4 should now be running Android 4.2.1.
[Source: The Android Soul]