[CLOSED] [GUIDE] How to solve wrong downgrade+fix USB connection to computer (P40Pro+ firmware on P40 Pro / N39 on N29)
- Thread starter badmania98
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It is hard to fix. But I need the full story. What EMUI version was before, what is now, what you used etc. A NM card is needed. I dont have a 100% solution, beacause is no EMUI11 C636 dload firmware available. I dont know if it can read now from OTG.
Last edited:
Previously was in EMUI 11 with full gapps working. Only notification problem. One day I want to try to fix the notification issue and I downgraded to 10.1.0.134 and reinstall google. At that time gapps installation was not successful. The I try to downgrade lower. I accidentically put ELS-N39 10.1.0.132 OVS , 10.1.0.1 R5 preload and 10.1.0.8 cust on hisuite proxy to flash. Flashing successful but auto restarting issue occurred. Now no USB supported but I can access OTG and NM. Thanks.
Model ELS-NX9
Build Number ELS-N39 12.0.0.218(C432E3)
I am in Norway. Phone restarts every 4-5 min acctually
Build Number ELS-N39 12.0.0.218(C432E3)
I am in Norway. Phone restarts every 4-5 min acctually
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Ok. You wrote a P40Pro+ firmware (EMUi12) on P40 Pro phone. Not many choices. What exactly version was before that?
udid:true
* VendorCountry:hw-eu
* C_Version:C432
* D_version
000
* DashBoard:41.003.53.00.06
* DeviceName:ELS-N29
* packageType:full
* FirmWare:
* FirmWare_Base:ELS-LGRP4-OVS 11.0.0.230
* FirmWare_Cust:ELS-N29-CUST 11.0.0.3(C432)
* FirmWare_Preload:ELS-N29-PRELOAD 11.0.0.3(C432R4)
*
* VendorCountry:hw-eu
* C_Version:C432
* D_version
000* DashBoard:41.003.53.00.06
* DeviceName:ELS-N29
* packageType:full
* FirmWare:
* FirmWare_Base:ELS-LGRP4-OVS 11.0.0.230
* FirmWare_Cust:ELS-N29-CUST 11.0.0.3(C432)
* FirmWare_Preload:ELS-N29-PRELOAD 11.0.0.3(C432R4)
*
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7Did 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:
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:
4. Use the same procedure with 202 firmware.
At the end will be like this:
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:
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://xdaforums.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.2
Yes. It is clear. You have nothing to do with this thread and those firmware.
You have to use wifi connection and download&install GMS on your 10.1.0.114 (you gone to low. It was better on 10.1.0.121). After that upgrade to 11.0.0.202 using one of that, and your USB will be fine:
a. HiSuite-original (no proxy)
b. MyHuawei App
c. OTA ( phone menu)
d. eRecovery (wifi)
You can find more on my thread here.
Reading first will help you.2I wasn't able to change from EMUI 11 to EMUI 10 directly.
These steps helped me:
1. Downgrade EMUI 11.x.x.x to the lowest version of EMUI 11 for your device (11.0.0.151 should do). Using HiSuite Proxy
2. Downgrade EMUI 11.0.0.151 to 10.1.0.176 using HiSuite without Proxy (select other version in Hisuite)
3. Downgrade from 10.1.0.176 to 10.1.0.121 using HiSuite 10.1.550 and Proxy or use OTG and SD-Card.11
