Upgrade or Install Samsung Galaxy Note 4 SM-N910U to Android Lollipop 5.1.1. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-N910U. You can download your Samsung Galaxy Note 4 SM-N910U firmware at the page, available for some countries. How to Root for Samsung Galaxy Note 4 SM-N910U is the separated post, this post only for upgrading to Android Lollipop.