Upgrade or Install Samsung Galaxy S4 SGH-I337M to Android Lollipop 5.0.1. The firmware available for downloading http://www.sammobile.com/firmwares/database/SGH-I337M/. You can download your Samsung Galaxy S4 SGH-I337M firmware at the page, available for some countries. How to Root for Samsung Galaxy S4 SGH-I337M is the separated post, this post only for upgrading to Android Lollipop.