Less than a month after the last Android update launched, Google is now treating Nexus users to another iteration of KitKat: Android 4.4.4 KitKat. It made its way to the factory images repository first, but is also slowly rolling out over-the-air to compatible smartphones and tablets. But how to install it?
Android 4.4.4 KitKat, build version KTU84P, is available, through a corresponding factory image, for the Nexus 4, Nexus 5, 2012 Wi-Fi Nexus 7, 2013 Wi-Fi Nexus 7, and Nexus 10. The Nexus 7 slates with cellular connectivity (3G and 4G, launched in 2012 and 2013, respectively) have yet to receive the same treatment.
While there is no official changelog provided so far, an unofficial one reveals that we are looking mostly at bug fixes, security patches and various tweaks. These affect the Android Compatibility Test Suite and Framework Classes and Services, Chrome browser (WebKit and OpenSSL) and OpenSSL library. You can check out the unofficial changelog here (it includes changes from Android 4.4.3 KitKat build version KTU84M).
At the time of writing this article, the OTA upgrade link was only captured for the Nexus 5. Keep in mind that you need to be running Android 4.4.3 KitKat, version number KTU84M, in order to successfully upgrade using this method.
If you want to upgrade your Nexus device to Android 4.4.4 KitKat, you need to do the following:
1. Turn off your Nexus 5.
2. Press and hold Volume Down and Power until you see the Fastboot screen.
3. Use the volume buttons to highlight ''Recovery mode'' and press Power to confirm.
4. Using the volume buttons again, highlight ''Apply update from ADB'' and press Power.
5. On your computer, hold Shift and right click in a blank area of the ADB Tools window (in Windows Explorer). Select ''Open command window here''. This will open the command prompt window.
6. Connect your Nexus device with a USB cable.
8. Wait for the install to complete and your Nexus 5 to reboot.
If you have any issues, you can then do a factory reset before restoring your apps and data.
7. Go to the command prompt window and enter the following (using the file name of the OTA zip, whatever you chose to call it):