Upgrade or Install Samsung Galaxy J1 SM-J120M to Android 5.1.1 Lollipop. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-J120M/. You can download your Samsung Galaxy J1 SM-J120M firmware at the page, available for some countries. How to Root for Samsung Galaxy J1 SM-J120M is the separated post, this post only for upgrading to Android Lollipop.
Tags: Android 5.1.1 Lollipop, firmware update, Samsung Galaxy J1 SM-J120M