Firmware update: Samsung Galaxy J3 SM-J320FN Android 5.1.1 Lollipop. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-J320FN/. You can download your Samsung Galaxy J3 SM-J320FN firmware at the page, available for some countries. How to Root for Samsung Galaxy J3 SM-J320FN is the separated post, this post only for upgrading to Android 5.1.1 Lollipop.