Huawei P20 Lite stuck on EMUI 8 - Huawei P20 Lite Questions & Answers

Hello all, I've been experiencing a few problems with installing lineage os on my P20 lite.
According to some others, TWRP seemed to not like the version of EMUI 9 I was on at the time. To get around this I thought I could downgrade to a previous version of EMUI 9 however I ended up downgrading to EMUI 8 by mistake. TWRP seems to not like EMUI 8 even more and I can't even properly transfer files to the device anymore.
The eRecovery function of EMUI 8 does not work and gives the error "Getting authentication info failed" when I try to update, and I had already wiped the OS before I realised my mistake. Making it almost impossible for me to update it to a working version.
Firmware is very hard to find for this device and I'm not sure how to use the ones I have found. Does anyone have any ideas of how I could resolve this issue?
Thanks for any help you can provide.

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nitrox8760 said:
Hello all, I've been experiencing a few problems with installing lineage os on my P20 lite.
According to some others, TWRP seemed to not like the version of EMUI 9 I was on at the time. To get around this I thought I could downgrade to a previous version of EMUI 9 however I ended up downgrading to EMUI 8 by mistake. TWRP seems to not like EMUI 8 even more and I can't even properly transfer files to the device anymore.
The eRecovery function of EMUI 8 does not work and gives the error "Getting authentication info failed" when I try to update, and I had already wiped the OS before I realised my mistake. Making it almost impossible for me to update it to a working version.here
Firmware is very hard to find for this device and I'm not sure how to use the ones I have found. Does anyone have any ideas of how I could resolve this issue?
Thanks for any help you can provide.
Click to expand...
Click to collapse
in fastboot mode run commands:
fastboot oem get-build-number
fastboot oem get-product-model
fastboot getvar vendorcountry
fastboot oem oeminforead-CUSTOM_VERSION
fastboot oem oeminforead-SYSTEM_VERSION
and post the results.
Some might fail, so don't worry about it.
As for TWRP, look here

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-Alf- said:
in fastboot mode run commands:
fastboot oem get-build-number
fastboot oem get-product-model
fastboot getvar vendorcountry
fastboot oem oeminforead-CUSTOM_VERSION
fastboot oem oeminforead-SYSTEM_VERSION
and post the results.
Some might fail, so don't worry about it.
As for TWRP, look here
Click to expand...
Click to collapse
Heres the results:
Code:
fastboot oem get-build-number
(bootloader) :ANE-LX1 8.0.0.161(C782)
fastboot oem get-product-model
(bootloader) ANE-LX1
fastboot getvar vendorcountry
vendorcountry: h3g/gb
fastboot oem oeminforead-CUSTOM_VERSION
FAILED (remote: 'Read oeminfo failed!')
fastboot oem oeminforead-SYSTEM_VERSION
(bootloader) :ANE-LX1 9.1.0.161(C782E4R1P7)
Using a version of TWRP I found on that post, I am now able to transfer files to the device. Sadly I cant install lineage os, probably because I'm still on EMUI 8.

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nitrox8760 said:
Firmware is very hard to find for this device
Click to expand...
Click to collapse
I can't give you a direct link (because of forum rules), but you can google it: 9.1.0.286 (`single & dual)
HUAWEI P20 LITE ANE-LX1 ANE-L01 HW EU HLRCF ANNE-L21 9.1.0.286(C782E5R1P7T8) FIRMWARE EMUI9.1.0 05015EHQ
If it will incompatible or so, first flash 8.0.0.159 for single SIM
HUAWEI P20 LITE ANE-LX1 ANE-L01 HW EU ANNE-L01 8.0.0.159(C782) FIRMWARE 8.0.0 R1 EMUI8.0 05015ARN
or for dual SIM 8.0.0.152
HUAWEI P20 LITE ANE-L21 ANE-LX1 HW EU ANNE-L21 8.0.0.152(C782) FIRMWARE 8.0.0 R1 EMUI8.0 05015EHQ
Use dload method, instructions can be found in ReleaseDoc folder .

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-Alf- said:
I can't give you a direct link (because of forum rules), but you can google it: 9.1.0.286 (`single & dual)
HUAWEI P20 LITE ANE-LX1 ANE-L01 HW EU HLRCF ANNE-L21 9.1.0.286(C782E5R1P7T8) FIRMWARE EMUI9.1.0 05015EHQ
If it will incompatible or so, first flash 8.0.0.159 for single SIM
HUAWEI P20 LITE ANE-LX1 ANE-L01 HW EU ANNE-L01 8.0.0.159(C782) FIRMWARE 8.0.0 R1 EMUI8.0 05015ARN
or for dual SIM 8.0.0.152
HUAWEI P20 LITE ANE-L21 ANE-LX1 HW EU ANNE-L21 8.0.0.152(C782) FIRMWARE 8.0.0 R1 EMUI8.0 05015EHQ
Use dload method, instructions can be found in ReleaseDoc folder .
Click to expand...
Click to collapse
Dload method will erase all your data and will lock the bootloader!

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-Alf- said:
Dload method will erase all your data and will lock the bootloader!
Click to expand...
Click to collapse
Thanks a lot for pointing me in the right direction. It's all sorted now using the method you suggested.