Firmware update: Samsung Galaxy S5 SM-G900FQ Android 6.0.1 Marshmallow. The firmware available for downloading https://samsung-firmware.org/model/SM-G900FQ/. You can download your Samsung Galaxy S5 SM-G900FQ firmware at the page, available for some countries. How to Root for Samsung Galaxy S5 SM-G900FQ is the separated post, this post only for upgrading to Android 6.0.1 Marshmallow.