[Honor 8 Guides, News, & Discussion] ScardracS:
Hi all! After sarchin' on the net (and haven't found anything good), I'll make a guide on How to unroot, unbrick 'n' lock your device.

BEFORE ALL

There is one problem: The rollbacks don't exist for all models, so this guide isn't for everything models. I don't recommend to use it for India, China, Middle East regions' versions.

You can find everything needed for you

HERE for the FRD-L09

HERE for the FRD-L04 (thanks to [MENTION=8395035]matt914[/MENTION])

TESTED DEVICES

FRD-L09 (By me)

FRD-L04 (By [MENTION=8395035]matt914[/MENTION] again)

/*
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns about features included in this GUIDE
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/

WHAT YOU NEED

1. Your device (that guide is only for Honor 8)

2. Your rollback and MM packages WATCH HERE

3. A MicroSD card and its MicroSD/SD or MicroSD/USB reader

4. Your PC (I've tested it with linux, but You can use Windows too).

5. Your USB cable

HOW TO

1. Download the rollback and the MM firmware from hihonor

2. Extract the zip packages, you'll find a dload folder and some pdfs (you can delete these pdfs)

FOR LINUX

3. Before all install the android-tools (google is your friend on that)

4. With THAT you'll be able to extract files from MM UPDATE.APP (thanks to [MENTION=313450]marco.minetti[/MENTION]), you'll find lots of .img files, but we need BOOT.img and RECOVERY.img

5a. reboot your phone to fastboot (Vol-/Power while plug it to your PC)

5b. Open a terminal on the folder where you have the previous 2 files and type:

sudo fastboot flash boot BOOT.img
sudo fastboot flash recovery RECOVERY.img
sudo fastboot reboot

6a. Your device now is semi-bricked (it can reboot to erecovery and to fastboot but it can't boot)

6b. Shut down your device (long press Power, it will reboot. Press vol+ while asked and boot to erecovery, than shutdown)

7a. Put your rollback's dload folder on the root of the MicroSD (NOT THE INTERNAL MEMORY!)(Use a MicroSD reader)

7b. Insert the MicroSD on your Honor

8. Press Vol+/Vol-/Power and it will start flashing the rollback

9. Your device still in a semi-bricked condition

10. Make passage 7 and 8 again with the MM firmware

11. Now it will boot up without any problem and with MM installed

FOR WINDOWS

3. Before all install the minimal android tool (google is your friend on that)

4. With Huawei Extractor tool, you'll find lots of .img files, but we need BOOT.img and RECOVERY.img (FROM THE MM UPDATE.APP)

5a. reboot your phone to fastboot (Vol-/Power while plug it to your PC)

5b. Open a CMD (with administrator access) on the folder where you have the previous 2 files and type:

fastboot flash boot BOOT.img
fastboot flash recovery RECOVERY.img
fastboot reboot

6a. Your device now is semi-bricked (it can reboot to erecovery and to fastboot but it can't boot)

6b. Shut down your device (long press Power, it will reboot. Press vol+ while asked and boot to erecovery, than shutdown)

7a. Put your rollback's dload folder on the root of the MicroSD (NOT THE INTERNAL MEMORY!)(Use a MicroSD reader)

7b. Insert the MicroSD on your Honor

8. Press Vol+/Vol-/Power and it will start flashing the rollback

9. Your device still in a semi-bricked condition

10. Make passage 7 and 8 again with the MM firmware

11. Now it will boot up without any problem and with MM installed

AT THE END

If you have followed the instructions correctly you'll with a device with MM firmware. It will download b380 and than b389 (for the FRD-L09 version).

Flashing the MM package will lock your device (not relock) so you don't need the fastboot oem lock [key]