Galaxy S4 CM13 and Marshmallow update release details

Download Sprint Galaxy S4 Lollipop Update: L720VPUGOD2 Stock Firmware [Odin TAR]

Easily Root Sprint Samsung Galaxy S4 on Android 4.4 KitKat Update L720TVPUBNAF

Get Official Android 4.4.2 KitKat Update for Sprint Galaxy S4 SPH-L720 – L720TVPUBNAF

How to Unbrick or Restore Sprint Galaxy S4 SPH-L720

How to Downgrade Sprint Galaxy S4 SPH-L720 to Android 4.2.2 Jelly Bean [Back To Stock]

Back to Stock: Get the Official Android 4.3 Update for Sprint Galaxy S4 SPH-L720 – L720VPUEMK2

Carbon ROM also brings KitKat Update to Sprint Samsung Galaxy S4 [Android 4.4]

Latest TWRP Recovery for Sprint Galaxy S4 (Android 4.4 Compatible!)