Firmware update: Samsung Galaxy S4 SPH-L720 Android 5.0.1 Lollipop. The firmware available for downloading http://www.sammobile.com/firmwares/database/SPH-L720/. You can download your Samsung Galaxy S4 SPH-L720 firmware at the page, available for some countries. How to Root for Samsung Galaxy S4 SPH-L720 is the separated post, this post only for upgrading to Android 5.0.1 Lollipop.