Firmware update: Samsung Galaxy S6 SM-G920I Android 6.0.1 Marshmallow. The firmware available for downloading http://www.sammobile.com/firmwares/database/SM-G920I/. You can download your Samsung Galaxy S6 SM-G920I firmware at the page, available for some countries. How to Root for Samsung Galaxy S6 SM-G920I is the separated post, this post only for upgrading to Android 6.0.1 Marshmallow.