Looks like this weekend is going to be an exciting one for owners of yet another Samsung device. The Galaxy Note 10.1 2014 Edition started receiving the KitKat update yesterday, and it turns out that so has the AT&T variant of the Galaxy S4 Active in the U.S.. AT&T has announced that KitKat is now rolling out to the device over the air, and the update's file size will vary between 447MB – 877MB depending on the version of the OS your Galaxy S4 Active is currently running. Also, the update will only be available over a Wi-Fi network for the first few days of availability.
The changelog and feature list remains the same as those for other Samsung devices updated to KitKat. Highlights include faster performance, while status bar icons, improved battery life, full-screen album art on the lock screen, and wireless printing support. Be patient as the update will take a while to propagate to every device, though as always, you can manually check in the Settings » General » About phone » Software updates menu.