Copy the extracted Update.app package to the external microSD card’s
“dload” folder (create a new one in case it isn’t already there)
Take a full backup of all your important data and apps using Huawei Backup app.
Unplug the USB cable and turn your device off.
Now hold Vol down + Vol up + Power for a few seconds to start the upgrade.
Your Huawei Honor 8 (FRD-L09) should now have Android 6.0 Marshmallow
B120 Firmware on your phone! Go to Settings > About phone to verify.
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