If you happen to own the HTC One (M8) that hails from AT&T, then here is some news for you – good news, that is. At least you need not put up with the heckling from your friends who own the unlocked version of the HTC One (M8), as well as other mates who are rocking to Sprint and T-Mobile as their smartphones have already received the Android 4.4.3 KitKat update, which is something that you as an AT&T subscriber ought to be able to enjoy later today.
Thanks to HTC Product Manager Leigh Momii who tweeted that the AT&T version of the HTC One (M8) will be on the receiving end of the Android 4.4.3 KitKat update some time later today. So far, AT&T and HTC have not put up any kind of official changelog for this particular update, but it ought not to venture too far away from the same update that hit the other HTC One (M8) models such as the relevant (and necessary) security fixes, better Wi-Fi and Bluetooth connectivity, enhancements to the camera, as well as optimizations made to the different features found on HTC Sense 6.
To look for the update on the AT&T HTC One (M8), go to Settings > AT&T Software Update > Check for updates, and be patient.