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It appears that Google is doing some behind the scenes magic, pushing out an OTA update to all Nexus 4, Nexus 7 and Nexus 10 owners. Having run this on one of our Nexus 7 (2013)’s just now, we can confirm the update is small — only 3.4MB for the Nexus 7 (2013) — so the size for other devices is probably about the same, but we can’t be sure.

On the post on Android Building, Google advises:

The source code for a bugfix build (KRT16S) is being pushed to
kitkat-release and will be tagged as android-4.4_r1.2. This release
is for Android 4.4 KitKat available for Nexus 7
(deb/flo/grouper/tilapia), Nexus 4, and Nexus 10.

Additionally, proprietary binaries and factory images will be made
available shortly.
Proprietary binaries:
Factory images:

If you’re after the OTA files directly (e.g. to pull apart, flash manually, or what have you) here they are:




This update is small and being pushed out very quickly, but only for Nexus 4, 7 and 10 — the Nexus 5 isn’t receiving this update at the moment. We don’t really know what the update is supposed to be fixing, though I’m sure someone will go through the AOSP code at some point and figure out what it fixes. If you’ve received the update and can share with us any new things you’ve found, please leave a comment below!

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Source: Android Building (Google Groups).
Devices: Nexus 10, Nexus 4, and Nexus 7