Sprint has released a new software update G925PVPS4DQL2 for Galaxy S6 and Galaxy S6 Edge in the US. The update comes with latest Android December Security patch.
Android December Security patch which fixes Common Vulnerabilities and Exposures discovered in the Android operating system. In addition, there are device stability improvements, bug fixes and further enhancements for performance.
Software update G925PVPS4DQL2 for Galaxy S6 and Galaxy S6 Edge will gradually release to everyone. You can also check manually for updates, go to Settings > About device > System update.
Make sure you have enough charge on your device at least 60% to 70% before downloading the update.