[Huawei P20 Lite Guides, News, & Discussion] Benjaes123:
This method may be outdated by now and I don't plan to update it, also keep in mind that this is very risky and there's a high chance of your device bricking.

If you want to downgrade, do your research and try by yourself.

Hello people this is my first thread (even though I've been quite some time here on xda):fingers-crossed::fingers-crossed:, just with the intent to help LX3 owners who desperately flashed the dload Pie update from the LX1 and rebranded their phones to LGRP2-OVS models.

For the record LGRP2-OVS is the international software for our phones, but most of the times it comes with bugs, in this case it breaks the update system.:eek:

Disclamer

* I'm not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed (like it did for me...).

* YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

* Oh and btw... your data WILL BE LOST.​

In this guide I'll try to help you guys downgrade from Pie LGRP2-OVS to an stable oreo buid using HiSuite and Firmware Finder.

First of all you're going to need:

- A Windows PC (with internet of course)

- A ANE-LX3 model with the LGRP2-OVS software. You can check this in the settings>About phone and Build Number (see screenshots).

- Patience...​

1) To start with, we are going to head up to our pc and add a line to C:\Windows\System32\drivers\etc\hosts (Open in notepad with administrator privilege's)

Code:

188.225.84.142 query.hicloud.com

2. Download and install HiSuite 9.0.2.304:

HiSuite 9.0.2.304.zip

3. Download HiSuite files.zip and replace:

httpcomponent.dll in C:/Program Files (x86)/HiSuite or other directory in which the application HiSuite is intalled.

HiSuiteConfig.xml in C:/Users/YOURUSERNAME/AppData/Local/Hisuite/userdata/UpdateDogDev

4. Download Firmware Finder and open it, head to the middle upper part of the program and click on cloud symbol that says "DNS update" (don't get confused with the right cloud that says "download manager"). Now copy the following text and paste it where it says "Register firmware for install on Team MT server" and then click Register.

For the c605 variant:

[url]http://update.dbankcdn.com/TDS/data/files/p3/s15/G3105/g1789/v188992/f1/full/update.zip[/url]

For the c25 variant:

[url]http://update.dbankcdn.com/TDS/data/files/p3/s15/G3105/g1789/v197834/f1/full/ANE-L03_claro_la/update_full_ANE-L03_claro_la.zip[/url]

For the c771 variant:

[url]http://update.hicloud.com:8180/TDS/data/files/p3/s15/G3105/g1789/v220817/f1/full/ANE-L03_hw_la/update_full_ANE-L03_hw_la.zip[/url]

For the c521 variant:

[url]http://update.dbankcdn.com/TDS/data/files/p3/s15/G3105/g1789/v231446/f1/full/ANE-L03_telefonica_la/update_full_ANE-L03_telefonica_la.zip[/url]

It's important that you don't follow the instructions on the "DNS update" window, after you click register Just minimize everything, but DON'T close it.

5) Run HiSuite, connect the device and do what the program tells you so it can connect to your phone. Click on software update, the update should appear, make shure its the correct version for your phone. Click where it says "Switch to other version", then "earlier version" and finally hit restore.

HiSuite should start downloading the update and the installing it on your phone, your phone will bootloop for a couple of times and will perform a low level format, this is normal so don't be scared. Its important to remember that the process should not be interrupted otherwise your device will be bricked.

Hope this helps you guys, my English isn't the best so correct me if I misspelled something and feel free to ask anything.:fingers-crossed::fingers-crossed:

Thanks to gmanrainy for the Firmware Finder Instructions