After shipping its latest version of Android, 4.4 KitKat, with the Nexus 5 smartphone, Google has begun rolling out the new OS to its older devices. Users with a Nexus 7 (2012 and 2013 Wi-Fi editions) or Nexus 10 tablet will be pleased to hear that the Android 4.4 rollout begins today. Additionally, Google says the Nexus 4 and cellular-enabled Nexus 7 will receive an update to 4.4 shortly. 4.4 KitKat should speed up older Android devices



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