Upgrade or Install Samsung Galaxy Grand Prime SM-G531F to Android Lollipop 5.1.1. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-G531F. You can download your Samsung Galaxy Grand Prime SM-G531F firmware at the page, available for some countries. How to Root for Samsung Galaxy Grand Prime SM-G531F is the separated post, this post only for upgrading to Android Lollipop.