[Honor 6X Guides, News, & Discussion] citizenserious:
I had trouble updating my Honor 6X (BLN-L21) after I rooted it, so I searched the whole xda to gain some information. Finally I made it, so I thought I could share this information with you guys, hope it helps, but I do not take responsibility if not, as you may have already heard, the Honor 6X (like every Kirin device) is very easy to brick.

- If everything is gone alright you should keep all of your data, apps and settings.

- If there is a big update, like from MM to N you maybe should backup all your stuff and relock the bootloader to update (big updates can relock frp so you can't unlock your bootloader then a rollback is the only way.

Successfully tried from:

B360 to B365

B365 to B367

Short Version (for expert users):

1. uninstall busybox bynaries and the Xposed Framework

2. uninstall magisk (inside the app)

3. flash stock recovery.img (of your actual firmware)

4. flash stock boot.img (of your actual firmware)

5. make OTA update (Reminder: safe update file)

6. flash twrp again and root

7. you are all done

Detailed Version:

#cmd commands#

1.

backup your system over TWRP

#adb reboot recovery# and do a backup there (for safety reasons)

2. #fastboot reboot#

3. uninstall busybox bynaries and the Xposed Framework(not just the app) (if you have it)

4. uninstall magisk (in app over "complete Uninstall button")

5. restart to bootloader #adb reboot bootloader#

6. flash stock recovery #fastboot flash recovery recovery.img# [use the recovery out of your actual firmware, how to extract is explained in the Forum I added at the end

7. flash stock boot #fastboot flash boot boot.img# [also use the extracted version of your actual package]

8. #fastboot reboot#

9. download update over OTA Update app (System update) in stock system. -> If the "System updater" app does

not provide a Full version of the update package, the update could get stopped at 8%

saying it could not verify the update, if so, just take the step to the error and reboot, if you then search for an update again, the "System updater" should now show you a Full version of the update package. like "BLN-L21C432B365-FULL"

10. you should safe that update files out of the HwOUC folder, so you can extract the recovery.img and boot.img later before you restart your device to do the update, because the system deletes these files after successful update

11. update over OTA Update app (System update) in stock system

12. restart to bootloader (#adb restart bootloader#)

13. flash twrp again #fastboot flash recovery twrp-3.1.1-0-berlin.img# [use the OpenKirin twrp edition (the official leads to a bootloop] -> [url]https://xdaforums.com/honor-6x/development/twrp-t3583413[/URL]

14.

Important is not to boot to system after flashing TWRP

, exactly like as you installed it the first time. So you do #fastboot reboot# and then Vol down + lock

15. backup your system over TWRP (for safety reasons)

16. #adb reboot recovery#

17. flash Magisk zip in TWRP again

18. reboot in twrp

19. you are ready to go with the latest stock rom​

How to extract boot.img and recovery.img out of your actual firmware is explained here:

[url]https://xdaforums.com/honor-6x/how-to/extract-stock-recovery-img-boot-img-img-t3676880[/URL] thanks [MENTION=8272809]Khan ubaid[/MENTION]​