Just as expected, Sprint has begun rolling out its Android 4.4.2 KitKat update for the Samsung Galaxy S4. The software adds the ART runtime, the ability to change your default SMS app with ease, and Zact Mobile compatibility.

This is a fairly minor update compared to the more recent Galaxy S4 firmware releases from Samsung — such as Android 4.3 Jelly Bean, which added a great deal more — but it’s still one to look forward to. These are the changes Sprint details on its website:

• Android 4.4 (Kit Kat): The Samsung Galaxy S 4 device will be updated to support the Android 4.4 (Kit Kat) software.
• Prevention Information alert: Customers should no longer receive “Prevention Information – An application has been forced to stop for an unauthorized attempt to access system in your device. It may be safe to delete an application obtained from an unauthorized route. Check now?” alert messages on the device.
• Zact Mobile: Device now includes the Zact Mobile compatibility.

The software comes with build number “JDQ39.L720VPUFNAE,” and it’s rolling out now over-the-air. Users will receive a notification when it’s ready.

• SourceSprint