Update issues after Downgrade

VVVNNN

Member
Jan 3, 2021
18
0
11
Doing some research I have found what is happening:

On your P40 Pro, in the "About phone" screen you can see the build number and then a number between ( ), example: Build number 10.1.0.131 (C636E8R5P1)

The number after the C will tell you the version or region of your firmware, in the example C636 = version/region 636

When you downgrade using a different version/region you will loose the OTA updates on the phone, and this will only be restored after you install your correct version/region firmware.

You will need to find the correct version of your firmware and have the "dload" version, and install it from external card. There is a video showing how to do this, but the link on the video is for a version/region 636, if you have a different version/region it won't fix anything.


Once you have the correct firmware and install it, you will begin receiving OTA again. This process, at least on my phone, erased everything, so be aware of this.
Before downgrading to version ELS-LGRP4-OVS 10.1.0.131, I CAN update OTA.
I downgraded to version ELS-LGRP4-OVS 10.1.0.131 then update to ELS-LGRP4-OVS 10.1.0.134 many times, BUT I cannot get an update OTA.
My P40 Pro current version: 10.1.0.134(C792E7R3P1)

Model ELS-N04
How to download firmware with the region C792.
Cust Software Version: ELS-N04-CUST 10.1.0.7(C792)
Preload Software Version: ELS-N04-PRELOAD 10.1.0.1(C792R3)
 

filigor94

Member
Dec 31, 2011
8
1
23
Hey guys, I've got a P40 Pro+ and had the same issue as you. I downgraded from 10.1.0.176 to 10.1.0.132, installed GMS, etc. and there weren't updates offered by the phone after all. I tried to update by HiSuite using HiSuite Proxy to several newer versions, it updated successfully, but there were still no updates offered. Then in the end I tried to remember back from what version did I downgrade originally, which was 10.1.0.176, I updated to that one with the Proxy and after that the phone started to offer updates again. Now I am on 11.0.0.151. Hope it might help some of you.
 
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VVVNNN

Member
Jan 3, 2021
18
0
11
Hey guys, I've got a P40 Pro+ and had the same issue as you. I downgraded from 10.1.0.176 to 10.1.0.132, installed GMS, etc. and there weren't updates offered by the phone after all. I tried to update by HiSuite using HiSuite Proxy to several newer versions, it updated successfully, but there were still no updates offered. Then in the end I tried to remember back from what version did I downgrade originally, which was 10.1.0.176, I updated to that one with the Proxy and after that the phone started to offer updates again. Now I am on 11.0.0.151. Hope it might help some of you.
Thank you very much
Is your mobile Canadian carrier (Koodo/Telus)?
Where did you download link 10.1.0.176?
 

VVVNNN

Member
Jan 3, 2021
18
0
11
Hey guys, I've got a P40 Pro+ and had the same issue as you. I downgraded from 10.1.0.176 to 10.1.0.132, installed GMS, etc. and there weren't updates offered by the phone after all. I tried to update by HiSuite using HiSuite Proxy to several newer versions, it updated successfully, but there were still no updates offered. Then in the end I tried to remember back from what version did I downgrade originally, which was 10.1.0.176, I updated to that one with the Proxy and after that the phone started to offer updates again. Now I am on 11.0.0.151. Hope it might help some of you.

Thank you very much.
My phone is the original firmware version ELS-LGRP4-OVS 10.1.0.148 (C792E7R3P1).
I downgraded to ELS-LGRP4-OVS 10.1.0.131 then ELS-LGRP4-OVS 10.1.0.134 to install GMS, but the phone lost OTA.
I have just updated to version ELS-LGRP4-OVS 10.1.0.148 and, now I can update the phone by OTA.
 

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filigor94

Member
Dec 31, 2011
8
1
23
Thank you very much.
My phone is the original firmware version ELS-LGRP4-OVS 10.1.0.148 (C792E7R3P1).
I downgraded to ELS-LGRP4-OVS 10.1.0.131 then ELS-LGRP4-OVS 10.1.0.134 to install GMS, but the phone lost OTA.
I have just updated to version ELS-LGRP4-OVS 10.1.0.148 and, now I can update the phone by OTA.
Nice to hear that, you are welcome ;)
 

Espen-82

Member
May 7, 2020
32
2
8
Thank you very much.
My phone is the original firmware version ELS-LGRP4-OVS 10.1.0.148 (C792E7R3P1).
I downgraded to ELS-LGRP4-OVS 10.1.0.131 then ELS-LGRP4-OVS 10.1.0.134 to install GMS, but the phone lost OTA.
I have just updated to version ELS-LGRP4-OVS 10.1.0.148 and, now I can update the phone by OTA.
When downgrading eg. from 10.1.0.183 to 10.1.0.154 (the OTA version just before downgrading for GMS install) via Hisuite proxy will the GMS and user data be erased?
I could try the 10.1.0.154 version if OTA starts working then again.
 

filigor94

Member
Dec 31, 2011
8
1
23
When downgrading eg. from 10.1.0.183 to 10.1.0.154 (the OTA version just before downgrading for GMS install) via Hisuite proxy will the GMS and user data be erased?
I could try the 10.1.0.154 version if OTA starts working then again.
I think all the apps are remaining even after the downgrade.
 

olaf2k4

Senior Member
Oct 20, 2011
144
25
58
Cluj
No, your phone won't boot in you don't wipe cache and data. However, while upgrading, apps remain.
Oh joy ... i have to downgrade due to getting signed out for some reason ...
They better stop this Huawei ban bullcrap ...
It's funny how you can install GMS on a F amazon tablet via ADB ... but Google has to ban big bad Huawei ...
 

saitron

Senior Member
Sep 3, 2010
56
8
28
Doing some research I have found what is happening:

On your P40 Pro, in the "About phone" screen you can see the build number and then a number between ( ), example: Build number 10.1.0.131 (C636E8R5P1)

The number after the C will tell you the version or region of your firmware, in the example C636 = version/region 636

When you downgrade using a different version/region you will loose the OTA updates on the phone, and this will only be restored after you install your correct version/region firmware.

You will need to find the correct version of your firmware and have the "dload" version, and install it from external card. There is a video showing how to do this, but the link on the video is for a version/region 636, if you have a different version/region it won't fix anything.


Once you have the correct firmware and install it, you will begin receiving OTA again. This process, at least on my phone, erased everything, so be aware of this.
This is the correct and exactly explanation. Mine is C605 From LATAM, is important to downgrade with the same region.... Thanks bro!
 

Espen-82

Member
May 7, 2020
32
2
8
Downgraded today from 10.1.0.183 back to 10.1.0.131 with hisuite proxy, then installed vanced, gms, and all the apps again.
Also got immediately two ota updates, and now the phone is on ver. 11.0.0.151.
I have always used the right region firmwares.
So hisuite proxy downgrade does not break ota updates, it is the hisuite proxy updates which breaks ota (and hisuite) updates.
 
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