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

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badmania98

Senior Member
Sep 23, 2007
1,201
470
51
ROMANIA
Huawei P40 Pro
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.

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.
 
Last edited:
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starbase64

Senior Member
Apr 3, 2007
4,366
1,696
someone has an idea for me to downgrade or flash correct region?

My device: P40 Pro C432 (germany)

i have tried this, but flash fail - wrong region
- ELS-LGRP4-OVS 10.1.0.121
- ELS-N29-CUST 10.1.0.8(C432)
- ELS-N29-PRELOAD 10.1.0.2(C432R5)
 

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starbase64

Senior Member
Apr 3, 2007
4,366
1,696
what can i do?
 

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starbase64

Senior Member
Apr 3, 2007
4,366
1,696
all files downloaded
 

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  • Desktop Screenshot 2021.09.16 - 08.03.35.80.png
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badmania98

Senior Member
Sep 23, 2007
1,201
470
51
ROMANIA
Huawei P40 Pro
When you get the error? On HiSuite are 2 parts: download part from internet to computer and copy part from computer to phone. Then the phone restarts and writes the firmware.
 

starbase64

Senior Member
Apr 3, 2007
4,366
1,696
Error comes after Download. Group Version error is from Hisuite Proxy.
 

Attachments

  • Desktop Screenshot 2021.09.16 - 08.12.00.35.png
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starbase64

Senior Member
Apr 3, 2007
4,366
1,696
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
 
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badmania98

Senior Member
Sep 23, 2007
1,201
470
51
ROMANIA
Huawei P40 Pro
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
Try the attached one.
 

starbase64

Senior Member
Apr 3, 2007
4,366
1,696
10.1.0.550 works ... maybe ... keep your fingers crossed for me 😁
 

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starbase64

Senior Member
Apr 3, 2007
4,366
1,696
this part is complete and installation process is running :D
 

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  • Desktop Screenshot 2021.09.16 - 08.54.01.51.png
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starbase64

Senior Member
Apr 3, 2007
4,366
1,696
device is still NX9 and USB wont work, but OTA works
 

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  • Screen1.jpg
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starbase64

Senior Member
Apr 3, 2007
4,366
1,696
USB wont work, now on 11.0.0.151

edit: FW 202 via eRecovery and USB works again
 

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  • Screenshot_20210916_100444.jpg
    Screenshot_20210916_100444.jpg
    202.6 KB · Views: 66
  • Screenshot_20210916_100420_com.huawei.android.projectmenu.jpg
    Screenshot_20210916_100420_com.huawei.android.projectmenu.jpg
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  • 1
    Just want to say thanks to badmania98 for his help to fix play services on my phone. All of it working perfectly including push notifications and no more play protect error as well.

    I really think it's still value for money for the small amount of donation compared to us troubleshooting and try to fix the issue for few hours or days. He completed the installation and fixed it just within 30 mins and it might took me few days to figure it out(or won't ever figure it out as well :D)

    Totally would recommend anyone that need assistance with their Huawei phone and its play services installation to reach out to @badmania98
  • 1
    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.

    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