MK2 update said to resolve 'sleep mode' issues
Sprint has announced on its community message boards that its Samsung Galaxy S4 has been updated with a minor bug-fixing patch. The update to firmware version "MK2" is said to resolve issues with sleep mode on the phone, but that's the only change pointed out in the carrier's official changelog. It comes a month after Sprint's GS4 got its Android 4.3 update.
Sprint's post flags this update as having been pushed out on Nov. 30, and according to reports from the Android Central forums, the update has been arriving on handsets over the weekend. So if you've not already got it, now's the time to start hitting that "Check for updates" button.