Google announced a bunch of new features in the upcoming Android N during the Google I/O keynote, one of which was seamless updates. With this, new Android devices running N will be able to download the updates in the background and the next time you restart the device you will be running the new version. Turns out, the key word here is 'new'. According to Android Police, the seamless update features won't be coming to existing Android devices. The feature requires two partitions, one offline and one online, and it installs the update on the offline partition and then switches it to...
Source: http://www.gsmarena.com/android_n_seamless_updates_not_coming_to_existing_devices-news-18325.php