[Huawei P40 Pro Guides, News, & Discussion] badmania98:
Downgrade

IF YOU HAVE GMS ERRORS

DO NOT RESET THE PHONE TO FACTORY SETTINGS AND DO NOT MAKE EMUI DOWNGRADE​

!!!! 20230520: ALL DOWNGRADES FOR ALL DEVICES/REGIONS ARE UP SIDE DOWN DUE TO HUAWEI PROTECTION MEASURES. IT IS DIFFICULT TO MANAGE THE SITUATION NOW. FOR SOME DEVICES I HAVE A SOLUTION, BUT I DONT KNOW HOW MUCH TIME IT WILL WORK.

Solutions after February 2024:

On chapter ”Solutions before May 2023” are few details/apps/info that could help or just for your information.

For P40 Pro C432 you can use this solution:

a. From EMUI12 downgrade to any EMUI11.0.0.2xx using HiSuite Proxy 3.3.0 and HiSuite 11.0.0.650_OVE and https://professorjtj.github.io/v2/ or with the last HiSuite 14 official. Avoid 11.0.0.260.

b. From EMUI11.0.0.2xx downgrade to EMUI10.1.0.131 using HiSuiteProxy 2.4.0.0 and HiSuite 10.1.0.550_OVE, selecting:

Base from Firmware v1 or Downgrade Archive https://professorjtj.github.io/

CUST+PPRELOAD from Downgrade Archive https://professorjtj.github.io/Downgrade/.

Change the computer date to a previous one of September 2023, before starting download part in HiSuite. Otherwise you will get error on Download part at 99%.

View attachment 5944135

For other regions you try to use the same procedure with your region files version.

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Solutions before Before May 2023:

The following procedures could not work anymore:

0. 20220315: Downgrade from EMUI12 is working with HiSuite 11.0.0.610 or newer.

For P40 Pro C432, to downgrade ( do not skip point 3):

a. from stable EMUI12 12.0.0.218/228 to EMUI11 11.0.0.260 ( P40Pro C432), use the newest original version of HiSuite. At this moment is HiSuite_11.0.0.610_OVE. No proxy has been used.

View attachment 5523525View attachment 5523531View attachment 5523533

b. from ELS-LGRP4-OVS 11.0.0.260 to EMUI11 11.0.0.230 ( P40Pro C432) you can downgrade using the solution described here.

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

Here is my guide: - here.

2. EMUI downgrade procedure chart - here.

3. from EMUI version

<

11.0.0.260

to EMUI10.1.121 131( P40Pro C432) EMUI downgrade tutorial - one step : here The procedure is the same for all Huawei phones and regions. You have to use the

specific files

for every region and phone type. Ask on thread if you dont know what files you need.

4. Firmware Downgrade with HiSuite proxy and Offline Packages: here (AVOID IT).

5. HOW TO flash DLOAD FW guide: here .

Don't use

DLOAD firmware to downgrade between major EMUI version (ex: from EMUI11 to EMUI10). It is used to downgrade between firmware from the same major EMUI version (Ex: from 10.1.0.176 to 10.1.0.131).

6. 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.

Harmony TP cable works also, in case your computer/laptop

doesn't

have USB-C port. You can build/make one (search the procedure on YouTube).

7.

In case you get internet connection issue see

here.

8. HiSuite Proxy v3.xx Virus Alert : here.

Note: 2022.01.01 Where is mentioned https://www.firmfinder.ml/ use https://professorjtj.github.io/