Here are the key changes in Android 4.4 KitKat
 

Google unveiled the Nexus 5 along with Android 4.4 KitKat today, and the latest version of Android comes with a host of new features. One of the key changes that have been included in Android 4.4 KitKat is a new immersive mode which lets you focus on the task at hand while hiding all background [...]

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