Samsung Galaxy S5 (SM-G900P) on Sprint is receiving the December Security Update. Weighing in at around 240 MB, the update brings the Software version G900PVPU3CPL2 and introduces a number of security fixes and performance improvements.
Sprint has yet to update its software update page for the Samsung Galaxy S5 model, so it unclear what else has changed or improved with the update. But we will keep you informed, if it becomes available.
If you looking for the update on your device, it may take sometime to arrive but you can manually check for update by going over to Settings >> about >> Software Update and check for updates.