Upgrade or Install Samsung Galaxy A8 SM-A800S to Android Lollipop 5.1.1. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-A800S. You can download your Samsung Galaxy A8 SM-A800S firmware at the page, available for some countries. How to Root for Samsung Galaxy A8 SM-A800S is the separated post, this post only for upgrading to Android Lollipop.