Two months later than expected, AT&T has today started pushing out the much-anticipated Android 4.4.2 KitKat over-the-air update to all of its carrier-branded LG G2 flagship smartphones located in the United States. In addition to the latest build of the open-source operating system, this upgrade also improves battery efficiency, enhances the Knock On feature and, finally, increases the processing speed by a whopping 17%.