AT&T announced today that the Samsung Galaxy S 4 Active will be their next device to receive Android 4.4. The device launched last summer at Android 4.2.2, before it received an update to 4.3 in January. The 4.4 KitKat update brings all of the regular UI, system, and app enhancements.
If you haven’t already received a notification to download the update, head to the Settings icon in the apps menu > Select the More Tab > Tap About Device > Select Software Update > Select Check for Updates and follow on screen instructions.
Source: AT&T Blog