Upgrade or Install Samsung Galaxy Gran Prime Duos TV SM-G531BT to Android Lollipop 5.1.1. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-G531BT/. You can download your Samsung Galaxy Gran Prime Duos TV SM-G531BT firmware at the page, available for some countries. How to Root for Samsung Galaxy Gran Prime Duos TV SM-G531BT is the separated post, this • Read More »