[GUIDE] How to solve wrong downgrade+fix USB connection to computer (P40Pro+ firmware on P40 Pro / N39 on N29)

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hashem1992

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Jan 24, 2022
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I think is better to read my first 7 messages on my thread. Here you have all you need.
Ask me on that thread if you need more details.
You will need this firmware to downgrade with DLOAD method.
I tried the firmware and the attached photo is what came up to me
 

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onderduiker

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Nov 26, 2007
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onderduiker

Senior Member
Nov 26, 2007
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Not my first time with custom firmwares.
But it doesn't work, and I don't know why. Followed every thing a few times.
It went wrong by changing to 10.1.0.176.
After that no usb only charging.
Always the same message,
Software install failed! Incompatibility with current version
Please download the correct update package
 

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badmania98

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Sep 23, 2007
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Huawei P40 Pro
Not my first time with custom firmwares.
But it doesn't work, and I don't know why. Followed every thing a few times.
It went wrong by changing to 10.1.0.176.
After that no usb only charging.
Always the same message,
Software install failed! Incompatibility with current version
Please download the correct update package
How did you downgrade? What method? What firmware was before downgrade?
 

onderduiker

Senior Member
Nov 26, 2007
160
13
I don't know excactly witch firmware, but I used HiSuite.
I tried to times. First time it went ok, but no usb. Then auto update two times to the latest.
After that I I guess it was the current version. Followed tutorial exactly.
 

gluck1

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Apr 20, 2011
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I understand that this is probobably a wrong thread, but I'll try
Is it possible to find P40 firmware for c10 region (Russia) with version downgradeable with HiSuite? All versions I found are C432 only
 

gluck1

New member
Apr 20, 2011
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Tell me the all story. What Firmware do you have (post a screenshot of About Phone) and what do you want to do?
I'd like to downgrade the firmware to theversion where google services can be installed. Unfortunately as i understand my version can't be downgraded directly using hiSuite proxy any more, and a downgrade using dload is required. So I'm looking for a suitable firmware for that for my region.
Meanwhile i found this firmware:
Huawei P40 ANA-NX9 ANA-N29 hw ru Anna-N29CB 10.1.0.168(C10E6R6P1patch02) Firmware EMUI10.1.0 05016PWN.
Can i directly downgrade to emui10 from my firmware using this file?

IMG-20220126-WA0001.jpg
 
Last edited:

badmania98

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Sep 23, 2007
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Huawei P40 Pro
I'd like to downgrade the firmware to theversion where google services can be installed. Unfortunately as i understand my version can't be downgraded directly using hiSuite proxy any more, and a downgrade using dload is required. So I'm looking for a suitable firmware for that for my region.
Meanwhile i found this firmware:
Huawei P40 ANA-NX9 ANA-N29 hw ru Anna-N29CB 10.1.0.168(C10E6R6P1patch02) Firmware EMUI10.1.0 05016PWN.
Can i directly downgrade to emui10 from my firmware using this file?

View attachment 5518967
There are few options, but some of them are risky or very risky. You have to get 10.1.0.121 to install GMS at the end.

V1. From 11.0.0.241 to 10.1.0.121 using HiSuite Proxy.

V2. From 11.0.0.241 to a lower version with original and newest version of HiSuite (not proxy), if the downgrade is available. After that continue with HiSuite Proxy to 10.1.0.121.

V3. (Risky) From 11.0.0.241 to 10.1.0.178 (from here, not for free) or 10.1.0.168 using DLOAD method. Will be no FastCharge and USB-cable transfer data between computer and phone. Then Upgrade (if available, with OTA or eRecovery+WiFi) several times to the first 11.0.0.2xx firmware that will provide you back the USB connection to computer. After that continue with HiSuite Proxy to 10.1.0.121.

V4. (Very Risky) Method B described here. Firmware in Note 1.
 

hashem1992

Member
Jan 24, 2022
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Thanks @badmania98 for your assistance 🙏 , For the C185 I bought a type C flash drive, it didn’t update through *#*#2846579#*#* as the phone couldn’t identify the drive but it did work through the pressing power button + volume up after turning the phone off , I don’t know why but eventually it worked.
 

gluck1

New member
Apr 20, 2011
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There are few options, but some of them are risky or very risky. You have to get 10.1.0.121 to install GMS at the end.

V1. From 11.0.0.241 to 10.1.0.121 using HiSuite Proxy.
V2. From 11.0.0.241 to a lower version with original and newest version of HiSuite (not proxy), if the downgrade is available. After that continue with HiSuite Proxy to 10.1.0.121.
V3. (Risky) From 11.0.0.241 to 10.1.0.178 (from here, not for free) or 10.1.0.168 using DLOAD method. Will be no FastCharge and USB-cable transfer data between computer and phone. Then Upgrade (if available, with OTA or eRecovery+WiFi) several times to the first 11.0.0.2xx firmware that will provide you back the USB connection to computer. After that continue with HiSuite Proxy to 10.1.0.121.
V4. (Very Risky) Method B described here. Firmware in Note 1.
V1 - HiSuite proxy site published the following warning:
- ALERT : Downgrading from Latest EMUI 11 disables your phone's Fast Charging, Fastboot, USB Connection and TestPoint.
- The only way to fix it is updating through OTA, E-Recovery or Dload by memory card to latest EMUI 11.
So I'm not sure this is a good way
V2 - unfortunately HiSuite (not proxy) does not allow to downgrade from the version I have so I'was looking for an EMUI11 dload firmware with older version to rollback and use HiSuite for firther downgrades
V3 I thought dload firmware is downgrading all components so dload firmware can be used to move from any to any version, isn't it?
V4 looks like it will be the last resort
 

badmania98

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Sep 23, 2007
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Huawei P40 Pro
V1 - HiSuite proxy site published the following warning:
- ALERT : Downgrading from Latest EMUI 11 disables your phone's Fast Charging, Fastboot, USB Connection and TestPoint.
- The only way to fix it is updating through OTA, E-Recovery or Dload by memory card to latest EMUI 11.
So I'm not sure this is a good way
V2 - unfortunately HiSuite (not proxy) does not allow to downgrade from the version I have so I'was looking for an EMUI11 dload firmware with older version to rollback and use HiSuite for firther downgrades
V3 I thought dload firmware is downgrading all components so dload firmware can be used to move from any to any version, isn't it?
V4 looks like it will be the last resort
I would try in this order V1-V4. If you know better...go ahead.
 
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celltellpb

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Jan 30, 2022
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The fact that the P40 PRO, no longer recognizes the usb connection after downgrade, has nothing to do with the cable or the device's connector.
I downgraded my device from EMUI 11 to EMUI 10, and it immediately stopped recognizing it.
I changed the cable, I changed the computer and it still didn't solve.
I ended up reinstalling the updates available via and wifi, and when I reinstalled 11.0.0.202, the device recognized the USB port again.
 

badmania98

Senior Member
Sep 23, 2007
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Huawei P40 Pro
The fact that the P40 PRO, no longer recognizes the usb connection after downgrade, has nothing to do with the cable or the device's connector.
I downgraded my device from EMUI 11 to EMUI 10, and it immediately stopped recognizing it.
I changed the cable, I changed the computer and it still didn't solve.
I ended up reinstalling the updates available via and wifi, and when I reinstalled 11.0.0.202, the device recognized the USB port again.
It is more complex than you described.
 

Nadym

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Sep 15, 2021
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This is for C432 region only. Do not use this firmware on other region firmware. I can prepare the firmware
Can I please request the DLOAD fix for C636? I've got N39 on N29 (C636) and I can't use anything to flash it.

I have a NM card and a OTG for NM/SD.

Would this be possible? Many thanks in advance.
 

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  • 5
    Did you downgrade P40Pro using P40 Pro+ firmware? Maybe this thread can help you.

    This is for C432 region only. Do not use this firmware on other region firmware. I can prepare the firmware for other region.


    When you downgrade P40Pro firmware using P40Pro+ firmware elements your phone will show like this:
    10.1.0.176a.jpeg
    10.1.0.176b.jpeg
    10.1.0.176 settings.jpeg



    On those phones can use OTG adapter + dload firmware.
    The steps:
    1. Download the dload firmwares (180 and 202) from this link:

    They are not the same firmware as the ones you can find on internet.

    2. Unzip 180 firmware and copy dload folder to the memory stick (NM card if OTG is not working)

    3. Write 180 firmware using memory-stick + USB-C OTG / NM Card + ProjectMenu\Software Upgrade\1.Memory card Upgrade. To access ProjectMenu, type *#*#2846579#*#* on the original dial app.

    At the end will be like this:
    11.0.0.180.jpg


    4. Use the same procedure with 202 firmware.

    At the end will be like this:

    11.0.0.202.jpeg


    5. The USB connection to computer is back now.

    6. Use HiSuite proxy to downgrade again using the N29 firmware files (https://www.firmfinder.ml/). After this step you will have N29 back.

    At the end will be like this:

    10.1.0.121.jpeg




    7. Now you can install Google, fix the push notifications ( I have the best solution, but is not free) and make update of EMUi to have USB connection to computer and fast charging back.

    LE:

    a. It is possible to skip to install 180 and write 202 directly, but nobody tried yet. Baby steps.

    b. User @bajangg said that ”3. If you choose another Emui 10 version, like Emui 10.0.1.176 and then lost OTA Update, USB Connection, and have no idea what to do, don't afraid. Last time, when i also in the same situation, USB Type C to Type C still working for me and make my device still can connect to HiSuite.” Source: https://forum.xda-developers.com/t/googlefier-install-gms-on-huawei-honor.4180485/post-85627761 I have not tested yet, but if it works you would begin with step 6.
    L.E. The transfer files between Computer and phone is available on the downgraded firmware (10.1.x.x) when you use a certain USB-c to USB-c cable. In this case a UGREEN, US355, USB-C To USB-C, 3.1, Gen.2, PD, 5A, 100W, 4K, 10 Gbps cable has been used. In the same time, using the original USB cable or other ordinary USB-c to USB-C cable have not activated the file transfer.

    c. You can use a NM card if OTG+Memory card doesn't work. You will download and extract/copy dload firmware on NM card using phone internet connection.




    Special thanks to @ciorax who puts in practice and updated my slim idea.
    1
    As I can see on your images, it doesn't download the files. Server problem or you dont have enough space on the computer partion C:\.

    Or your computer partition C:\ is not NTFS formatted (it is FAT 32 only).
    1
    I think that Your HiSuite version is not good.
    Use this tutorial, file included in description.
    1
    Search for HiSuite_11.0.0.550_OVE.exe. Maybe will work. Or the one attached, better.
    1
    Search for HiSuite_11.0.0.550_OVE.exe. Maybe will work. Or the one attached, better.
    Proxy error with this version
    Code:
     [08:27:35]: Checking if HISuite is Installed...
     [08:27:36]: HiSuite Exists, Proceeding...
     [08:27:36]: Closing HISuite....
     [08:27:38]: Checking HISuite Version...
     [08:27:39]: HiSuite Version 11 Is Installed, Proceeding....
     [08:27:39]: Patching HISuite Files....
     [08:27:40]: Patch failed, Aborting process....
     [08:27:40]: Please Contact Developer If Error Continues
     [08:27:41]: https://github.com/ProfessorJTJ/HISuite-Proxy/issues