Samsung released the KitKat kernel source code for Sprint's Galaxy S4 variant yesterday, which was a sign that the official KitKat update wasn’t far away. A leaked internal document from Sprint indicates that the KitKat update will be rolled out to users starting later today. The memo mentions that customers must wait until Google’s servers push the OTA update. The firmware build number is L720VPUFNAE, which is the same build number as the KitKat kernel source that was released yesterday.
The KitKat software update would allow devices to work on Sprint’s MVNO Zact Mobile. Users have to be on the latest software to receive the update, so do ensure that you are on the latest software build by going to Settings > About Device. With Sprint Galaxy S4 users making the move to KitKat, it shouldn't be long before other carriers start rolling the update.
