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[GUIDE] Upgrade from EMUI 4.1/Android 6.0 to latest firmware

It took me 2 full days to finally successfully upgraded my ancient firmware (L09C16B170) to the updated version (L09C432B397). There are a lot pieces of information that I gathered from this forum and all over the internet that collectively helped me navigate this ordeal. Just want to share it with anyone who is in the same boat, although I know that P9 won't last for too long since P10 has been out for a while. However, if you still want to revive your P9, keep reading.
Requirement
Before reading, you need to understand ways of entering different modes of your P9 phone, which will be used many many times during your upgrade:
Enter recovery mode (also how you enter TWRP) - see this GUIDE
Enter fastboot mode - see this GUIDE
Enter manual upgrade mode (also called dload method; This is NOT TWRP method) - see this GUIDE. Please IGNORE any software or download information in this guide. I want you to refer to this guide for how to do it, NOT what to use or download!
You also need to download and know how to use ADB tool which is quite simple. Search the forum or google and you will find plenty of information and the download links. If you hate command lines, you can even use the GUI version from here.
You will probably also need to use Firmware Finder for Huawei (HWFF) to download firmware of interest for manual update during this process. HWFF is an app that can be installed for free via your phone Google Play Store. The downloaded firmware is saved under the HWFF folder in the internal memory. You might need to unzip these files for upgrade via dload method or directly via TWRP method without unzipping. However TWRP method requires you to unlock the bootloader and install TWRP in the phone (see below for details).
First step - debranding
If you are already on C432xxxx, you might just skip this step. I followed this thread partially (Debranding Guide by Z-Blade), since the whole thing doesn't work for me 100%.
Z-Blade did a fantastic job describing how to debrand his C34 firmware to C342B361. My original version is C16B170 which is a South Africa branded firmware. But I found certain steps in this guide could be omitted and certain steps didn't work in my case. Here is my modified version based on Z-Blade's version:
1. Unlock your bootloader and install TWRP
How to unlock bootloader? Follow this GUIDE. Even though it's for Huawei Ascend XT. It works for P9 as well. You only need to complete Part 1.
After you unlock the bootloader, install TWRP. Depending on which firmware version you're on, the version of TWRP that might work for your device changes. I encountered numerous booting loops due to incorrect version of TWRP. Finally I found that these three versions work for me (3.1.0-0, 3.1.1-0, 3.1.1-1). Always go with the highest version first (3.1.1-1). If you find yourself stuck in the booting screen, long press your power button until you get out of it and install another version of TWRP. Please go to TWRP official website to download TWRP for Huawei P9. Follow this GUIDE to install TWRP recovery on your phone.
2. Flash OEM info file for C432
After you unlock the bootloader and install TWRP recovery, download oeminfo-huawei-p9-eval09-c432.zip from this THREAD and flash it via TWRP method.
3. Flash C432B136 firmware
Download and flash the dload-huawei-p9-eval09-eva-b136.zip via dload method from this thread. After flashing and rebooting your phone, you should be on the L09C432B136 firmware. NOTE: If it boots up to a white screen asking you to enter password, reboot into recovery by holding volume up when you powering up your phone, do a wipe partition and factory reset. You may need to reboot your phone a number times before the phone boots up correctly.
Up to this stage, you have debranded your phone to an european version.
Second step - stepwise firmware upgrade
1. Update from B136 to B166 or B182
As mentioned in Z-Blade's original post, many people will not be able to directly update from B136 to B182. I am one of them. Go into the updater in the phone setting, refresh "check for update". If you can receive B182 update, by all means go for it. If you only receive B166 update, go for it as well. After B166 update and rebooting your phone, check updater again to see if you receive B182 update in the Settings menu. If this method does not work, manually update to B182 by following the steps here via dload method.
2. Update firmware from B182 to B360/361/378 and also upgrade OS from Android 6.0/EMUI 4.1.x to Android 7.0/EMUI 5.0
According to Z-Blade, "After your phone has rebooted and you are on the B182 firmware, you need to now update the firmware to B361 via Huawei Updater 2.0". However, in my case, I tried many times and always failed at this step. I found a workaround by updating to B360 instead of B361. Please follow this GUIDE to update to B360 or B361, whichever works for you. However, please pay attention to following change that I found critical:
- The version of Huawei HiSuite is critical for the success in this step. The GUIDE provided Hisuite download link (version 5.0.0.301_OVE). However, it does not work together with Huawei Updater 2.0 in my hands. This error has wasted me almost half day. Instead, I finally found out the problem and went to HERE to download the version 5.0.1.300 and it finally worked
- However, if even after HiSuite and Updater both work together fine the update does not proceed successfully (the updater might get stuck), you need to update it manually via dload method. Search EVA-L09C432B360 or EVA-L09C432B361 in Firmware Finder for Huawei as mentioned above and download the Full-OTA version (~2G). After download, move the corresponding folder containing firmware zip files under "HWFF" folder in the internal memory to the external SD card. Unzip the firmware file and update your phone using dload method. You may also try TWRP method which can install zip files directly, but at this point, you bootloader will be re-locked and TWRP will be gone. You need to unlock the bootloader and re-install TWRP again as mentioned above.
After you successfully update the firmware to B360 or B361, now you should have Android 7.0 and EMUI 5.0 on your phone. Now go to the updater in your phone setting. You should receive B378 OTA update. Proceed with the update...
You might not need to strictly follow following steps to update your phone to any firmware beyond B378. However, since a lot of new ROMs are based on B380+ or even B390+, if you want to use those, you might need to further update your firmware first.
2. Update firmware from B378 to B383
After updating to B378 and rebooting your phone, check if your phone receives B383 update OTA. If yes, proceed. If not, go to HWFF, download B383 Full-OTA firmware and update via either dload or TWRP method.
3. Update firmware from B383 to whatever later version
After successfully updating your phone to B383, you basically can flash your phone with anything firmware and ROMs built on B380+. I find it unnecessary to update to B386. What I did was that I directly updated from B383 to B394 by following this GUIDE. Since I wanted to try BlueWei 5.7 which is based off B397, I also followed the same guide to update my firmware to B397 before flashing BlueWei ROM.
Now please enjoy all kinds of new ROMs and the fast, revived P9. After this update, my P9 is super smooth (the original firmware and OS was utterly slow and sluggish) and I think I will keep using this phone until it really can't keep up with the hardware requirement of new apps etc.
Hope my guide is helpful!

Nice job to update things and summarize all together. Few comments, though
- Not necessary to go back to c432 b136, to b182 is enough:
https://forum.xda-developers.com/showpost.php?p=75105886&postcount=280
https://forum.xda-developers.com/showpost.php?p=72153575&postcount=2
- For Nougat, please use Huawei P9 Nougat TWRP:
https://forum.xda-developers.com/p9/development/twrp-t3565703
- For DLOAD method, FullOTA-MF-PV versions should be used
- Besides the two methods listed to initiate DLOAD update, there is also a third one:
'Dial': *#*#2846579#*#*
Project Menu will open, select Software Update

Reisntalling B385 stock rom to my FRD-L04

Hi guys,
I am currently trying to figure out how to reinstall a clean version of the B385 for my FRD-L04. I have downloaded these two files from the Nougat Update for FRD-L04 Honor 8 (USA):
Full ROM – http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1585/g104/v83098/f1/full/update.zip
Data File – http://update.hicloud.com:8180/TDS/...FRD-L04_hw_usa/update_full_FRD-L04_hw_usa.zip
I have tried to flash them both from TWRP, but I always get the error: Updater process ended error 7
Can anyone please guide me through the process and let me know what I'm doing wrong?
I have look for a guide or post where this is detailed, but without luck. Can anyone link me to a guide on how to reinstall the stock firmware in my Honor 8 FRD-L04?
Thanks! :good:

The best way (if you don't want to unlock bootloader) is to flash a downgrade package first, then dload the Marshmallow update and finally your preferred Nougat update though Firmware Finder.

hackslash said:
The best way (if you don't want to unlock bootloader) is to flash a downgrade package first, then dload the Marshmallow update and finally your preferred Nougat update though Firmware Finder.
Click to expand...
Click to collapse
Thanks for the response. In my case, my phone is rooted, so I don't mind unlocking the bootloader. Would you please elaborate on how to do it that way?
Sent from my FRD-L04 using Tapatalk

juanboja said:
Thanks for the response. In my case, my phone is rooted, so I don't mind unlocking the bootloader. Would you please elaborate on how to do it that way?
Click to expand...
Click to collapse
Unlock your bootloader and follow this guide:https://forum.xda-developers.com/honor-8/how-to/guide-flashing-unapproved-firmwares-t3668306/
Choose the B385 firmware or any newer firmware available for your region.

So I decided to finally reinstall the stock firmware in my Honor 8 FRD-L04 in B389, and this is where the nightmare began.
- I made a full backup with TWRP just in case and I decided I wanted to start from the earliest firmware possible available.
- I started unrooting my phone using the UnSU zip by Osmosis.
- Then I flash via bootloader the recovery and boot image of the firmware B360.
- I flashed the rollback package from the Huawei official site with the B122 firmware also available at the same place. I saved the rollback package in my root directory in the dload folder, and loaded it with the 3-button method. After this I wasn't able to boot my phone normally, I was stuck in a boot loop. I still continue with the next firmware, the B122, and it was successfully loaded (this also relocked my bootloader).
- It is important to say I clear many times the cache and wipe/erase data through stock recovery options, and also tried to erecover but I wans't able to connect to the WiFi. I guess something was missing (at this point I was already going crazy).
- I was still stucked at a boot loop after loading the B122, so I decided to unlock my bootloader and flash the twrp 3.1.1-1-frd.img
- From there I tried to wipe data and cache and system and everything, but I wasn't able because an error saying unable to mount always appeared.
- After rebooting, since I already had unlocked the bootloader, the initial message prompting: "press power to continue, press for 3 seconds for erecovery, etc..." appeared.
- I enter the erecovery options with the hope it will do something... and it did!!! I could connect this time through WiFi and the system asked to update the firmware and many other things it said at that moment. This was the first time I felt relieved through the night.
- The phone updated perfectly, it started at the firmware B122 and I kept updating it until I reached the B389.
- I unlocked the bootloader again and rooted the phone. And everything is running smooth as silk!
I know this is a very long story, but I just want to get it out there in case anyone is facing the same problem I just passed. Hope this helps someone and brings peace to them! =) Good luck!

I believe B385 is not functional with TWRP. Flash B360 and reboot to recovery. This should go to stock recovery, where you will have to do a factory reset. I got EMUI working, but it refuses to update to any newer version (it does show B380 but doesn't update). Also there should be updates after making that update. The updates did work for other people, so you may be able to have it working.

juanboja said:
Hi guys,
I am currently trying to figure out how to reinstall a clean version of the B385 for my FRD-L04. I have downloaded these two files from the Nougat Update for FRD-L04 Honor 8 (USA):
Full ROM – http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1585/g104/v83098/f1/full/update.zip
Data File – http://update.hicloud.com:8180/TDS/...FRD-L04_hw_usa/update_full_FRD-L04_hw_usa.zip
I have tried to flash them both from TWRP, but I always get the error: Updater process ended error 7
Can anyone please guide me through the process and let me know what I'm doing wrong?
I have look for a guide or post where this is detailed, but without luck. Can anyone link me to a guide on how to reinstall the stock firmware in my Honor 8 FRD-L04?
Thanks! :good:
Click to expand...
Click to collapse
Try flash B360 then OTA to 388 or 391 (If 391 singed).

blackbuffalo said:
Try flash B360 then OTA to 388 or 391 (If 391 singed).
Click to expand...
Click to collapse
Thanks for the replies, any link to where I can find the B360?
Sent from my FRD-L04 using Tapatalk

juanboja said:
Thanks for the replies, any link to where I can find the B360?
Sent from my FRD-L04 using Tapatalk
Click to expand...
Click to collapse
http://pro-teammt.ru/firmware-database/?firmware_model=FRD-L04&firmware_page=0

blackbuffalo said:
http://pro-teammt.ru/firmware-database/?firmware_model=FRD-L04&firmware_page=0
Click to expand...
Click to collapse
Thank you very much for this info!
Sent from my FRD-L04 using Tapatalk

Upgrade form B394 to B402/403

Hello guys,
long story short, I had the notification that a new update was released for my honor 8 FRD-L09C432 (B403, I was on B402), so, since I was rooted and with TWRP installed, I decided to unroot and install the original eRecovery.
Something went wrong and the system was damaged, so I flashed the B360 version first and after the B394. Now the phone is working really good but I can't install the new versions (B402 or 403). I tried:
flash the update from TWRP, not working
search the update from the dedicated option in the settings, no update found
tried to have it from the original eRecovery, error to find the info from the server.
tried also to update from the version B394 before unlock the bootloader, but it failed.
Am I missing something?

Use the get update through DNS thing in FF. It worked for me at least. Make sure the firmware is approved.

Days Tech said:
Use the get update through DNS thing in FF. It worked for me at least. Make sure the firmware is approved.
Click to expand...
Click to collapse
Hi Days Tech, could you please explain better what do you mean? Is there a link of some tut that I can follow?
Thanks!

Ok now I have the point, thanks for this tip!:good:

Flash TWRP.
use data.zip file and flash it via TWRP. (only download from FullOTA-MF PV file)
reboot and you are done. you will have updater in settings.
now you can flash the update.zip file via dload.
dlaod guide in my signature.

Idiot's guide to updating stock firmware

Hello,
It's been many years since I messed with rooting or firmware flashes, so please help me out.
I am currently on 106 firmware on a CLT-L29C605 (latin american model).
I see in the following link that 121 firmware can be downloaded for my phone:
https://www.getdroidtips.com/download-huawei-p20-pro-b121-stock-firmware-8-1-0-121-clt-l09-clt-l29/
I have sent the request to Huawei for a bootloader unlock code.
What exactly do I need to do to flash the newer stock update? I don't care about root or xposed or any of that jazz, just want to keep pace with the latest and greatest stock firmware without having to wait for it to hit OTA (if ever).
Do I unlock bootloader and install TWRP and flash the update.zip? If so, do I need the official TWRP or unofficial?
Is there another way to flash the update.zip?
What's the easiest way to accomplish stock firmware updates?
Help!

Someone knowledgeable please weigh in!

Cant REALLY help you but afaik you dont need an unlocked bootloader for a stock firmware.
That doesn't make sense.

to get the newest OTA update you can use Firmware Finder (It's also available in the PlayStore). You don't need to unlock the bootloader or flash a custom recovery to use FirmwareFinder, but the firmware has to be approved for your device (you can check with Firmware Finder).
To flash not approved updates you have to:
1. Unlock bootloader
2. flash TWRP
3. use this Tool
BUT BE AWARE OF after flashing a custom recovery you can't use the offical way to get OTA updates, because it will boot to custom recovery instead of stock recovery. The official update.zip package has some checks which fail when you use TWRP.
The easiest way to get OTA updates without waiting is to use Firmware Finder.

kizilcali81 said:
to get the newest OTA update you can use Firmware Finder (It's also available in the PlayStore). You don't need to unlock the bootloader or flash a custom recovery to use FirmwareFinder, but the firmware has to be approved for your device (you can check with Firmware Finder).
To flash not approved updates you have to:
1. Unlock bootloader
2. flash TWRP
3. use this Tool
BUT BE AWARE OF after flashing a custom recovery you can't use the offical way to get OTA updates, because it will boot to custom recovery instead of stock recovery. The official update.zip package has some checks which fail when you use TWRP.
The easiest way to get OTA updates without waiting is to use Firmware Finder.
Click to expand...
Click to collapse
From what I understand, for locked boot loader, using Firmware Finder to update to latest approved firmware does not work for P20 and P20 Pro on Oreo 8.1. You will not be able to use the DNS or in-app Proxy method to update to the latest firmware.

Thanks for everyone that weighed in. I can now state with certainty that the idiot's best method is to use funky huawei. I emailed them the new firmware I was looking for my specific phone, they added it to their site, and I updated it this morning all in 20 minutes. No bootloader, root or any other drama. Their email support is EXCELLENT as well, well worth the reasonable price of entry.
I'm now on 121a, thanks all.

Ol' Blue Eyes said:
From what I understand, for locked boot loader, using Firmware Finder to update to latest approved firmware does not work for P20 and P20 Pro on Oreo 8.1. You will not be able to use the DNS or in-app Proxy method to update to the latest firmware.
Click to expand...
Click to collapse
I can download the newest fw with Firmware Finder, but if I do IMEI check all of them are not compatible.

donatinho said:
I can download the newest fw with Firmware Finder, but if I do IMEI check all of them are not compatible.
Click to expand...
Click to collapse
I have ran in to the same thing. Still searching for a work around without paying for Funky Huawei.

Did you notice any improvements regarding stability, performance or camera with this new version?
xxaarraa said:
Thanks for everyone that weighed in. I can now state with certainty that the idiot's best method is to use funky huawei. I emailed them the new firmware I was looking for my specific phone, they added it to their site, and I updated it this morning all in 20 minutes. No bootloader, root or any other drama. Their email support is EXCELLENT as well, well worth the reasonable price of entry.
I'm now on 121a, thanks all.
Click to expand...
Click to collapse

FunkyHuawei works for me. takes a little bit of time to set new DNS servers in your router and then reset them after flashing but it has worked flawlessly for me. I have the same 605 phone and updated to 121a without any problems.

Question Can anybody provide a stock recovery img to replace TWRP ?

Hi to everyone, i'm currently on European rom version, bootloader is unlocked, phone is rooted and i have twrp installed. I have received OTA updates but I am unable to install them with twrp.
I would like to update my phone but I do not want to lose my data if possible. I Googled around and I realized that in order to install the update I must have the stock recovery, unless there is another way which I do not know, as I am not very familiar with these things.
I have looked everywhere and I cannot find the img file for the stock recovery, so I would appreciate if somebody could provide it, as it will probably be helpful for others as well.

recovery from RMX3370GDPR_11_C.07

RMX3311 said:
recovery from RMX3370GDPR_11_C.07
Click to expand...
Click to collapse
Thank you so much for providing the stock recovery. Would you know if it is different for previous versions of the rom?

What Fw is on your GT Neo2?
Enter *#6776# in the Dialer and post the Screenshot or tell me your Fw.
To install OTA updates you have to unroot first, after the update you can root again, with the "boot.img" of the new Fw.

RMX3311 said:
What Fw is on your GT Neo2?
Enter *#6776# in the Dialer and post the Screenshot or tell me your Fw.
To install OTA updates you have to unroot first, after the update you can root again, with the "boot.img" of the new Fw.
Click to expand...
Click to collapse
Unfortunately two hours ago my phone fell down when i was biking and was smashed by a passing car. The irony is I was worried about not loosing my data and now the phone is damaged beyond repair. I will see if I can find a used one since I can not afford a new one. Thanks again for your help.