Google has released the factory images of Android 4.4.4 Kitkat for Nexus Devices.. All the nexus devices that received Android 4.4.3 will be receiving the update. The Nexus 5 received the OTA update today and the other nexus devices are in line for the OTA update.... The update is supposed to bring some security improvements and fixes. The factory images are available for download. But I'll suggest you wait for the OTA if u need your data because flashing the factory image will delete all the user data.
Go ahead check do for the update...
Go ahead check do for the update...
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Android 4.4.4 Kitkat For Nexus Devices