Upgrade or Install Samsung Galaxy A5 Duos SM-A500G to Android Lollipop 5.0.2. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-A500G/. You can download your Samsung Galaxy A5 Duos SM-A500G firmware at the page, available for some countries. How to Root for Samsung Galaxy A5 Duos SM-A500G is the separated post, this post only for upgrading to Android Lollipop.