possible downgrade p40 lite?

[salvo1278]

hi sigma team, I have a huawei p40 lite 5g, I changed the region to receive Harmonyos, now I would like to go back and downgrade but hisuite doesn't let me do it, it always gives me an error, it only lets me update it but the downgrade doesn't start and then it freezes, I wanted to know if I can do it with sigma, and which firmware to use thanks!!!!!!!!!!








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SigmaPlus 1.00.01 HiSi: Get device info
Bootloader unlocked: NO
FB unlocked: NO
Battery voltage: 4.32 V
Phone model: CDY-AN00
Build number: CDY-AN00 3.0.0.165(C00E160R5P2)
Vendor/Country: all/cn
System version: Skipped
Android version: 10
Base version: CDY-LGRP1-CHN 103.0.0.165
Custom version: CDY-AN00-CUST 103.0.0.160(C00)
Preload version: CDY-AN00-PRELOAD 103.0.0.2(C00R5)
Huawei-Over-the-Air info:
C_version: C00
D_version: D000
PLMN: 22250
BoardID: 10940
DeviceName: CDY-AN00

[Gsmserver]

First, make a backup of this phone. Later, flash a lower version of the firmware from the same region.

[salvo1278]

I forgot to turn off the wifi and at night it updated again, now I have this security

SigmaPlus 1.00.01 HiSi: Get device info
Bootloader unlocked: NO
FB unlocked: NO
Battery voltage: 4.39 V
Phone model: CDY-AN00
Build number: CDY-AN00 3.0.0.171(C00E160R5P2)
Vendor/Country: all/cn
System version: Skipped
Android version: 10
Base version: CDY-LGRP1-CHN 103.0.0.171
Custom version: CDY-AN00-CUST 103.0.0.160(C00)
Preload version: CDY-AN00-PRELOAD 103.0.0.2(C00R5)
Huawei-Over-the-Air info:
C_version: C00
D_version: D000
PLMN: 22250
BoardID: 10940
DeviceName: CDY-AN00


I'm not able to downgrade, I'm not finding the right firmware, I had loaded this version

Base Package: CDY-LGRP1-CHN 102.0.0.165
Cust Package: CDY-AN00-CUST 102.0.0.165(C00)
Preload PKG : CDY-AN00-PRELOAD 102.0.0.6(C00R5)

but I get an error telling me that the file does not correspond to the tel,
Can someone tell me the right firmware thanks!!!!!

[mahmoudhossam7]

You must backup firmware and change oem and write flash if you cant text me

[salvo1278]

honestly I didn't want to open the phone to do the manual testpoint, do you have some files to do it automatically without opening the phone

[mahmoudhossam7]

its impposible need test point

[salvo1278]

after many attempts I managed to downgrade with Hisuite using a VPN, now I'm back with EMUI

SigmaPlus 1.00.01 HiSi: Get device info
Bootloader unlocked: NO
FB unlocked: NO
Battery voltage: 4.39 V
Phone model: CDY-AN00
Build number: CDY-AN00 10.1.1.215(C00E210R5P1)
Vendor/Country: all/cn
System version: Skipped
Android version: 10
Base version: CDY-LGRP1-CHN 10.1.1.215
Custom version: CDY-AN00-CUST 10.1.1.210(C00)
Preload version: CDY-AN00-PRELOAD 10.1.1.1(C00R5)
Huawei-Over-the-Air info:
C_version: C00
D_version: D000
PLMN: 22250
BoardID: 10940
DeviceName: CDY-AN00


now I wanted to change region but I get an error I don't understand why

SigmaPlus v.1.00.01
New version 1.00.02 is available on www.sigmakey.com. We strongly recommend to update SigmaPlus!
282266458 Sigma+ dongle 3.00, Initializing...OK
--------- 2023-11-20 10:31:16 ---------
SigmaPlus 1.00.01 HiSi: Software testpoint On.../Off
DBAdapter Reserved Interface (COM190), Provider: HUAWEI Technologies CO.,LTD, Driver ver.: 1.0.26.0, Date: 18/05/2016, USB\Vid_12D1&Subclass_13&Prot_23
If the operation fails with Full_OTA_update firmware type, use SD_update file type.
Hardware IMEI: 020304050607080
Flash file D:\FIRMWARE HUAWEI\P40 LITE 5G\update_full_base\UPDATE.APP
Please send
C:\Users\PC\Documents\SigmaPlus\temporary backup\0282266458\CindyN-LGRP1-CHN 10_1_1_215.skb
file to [email protected]
Data retention error

[salvo1278]

SigmaPlus 1.00.01 HiSi: Software testpoint On.../Off
DBAdapter Reserved Interface (COM190), Provider: HUAWEI Technologies CO.,LTD, Driver ver.: 1.0.26.0, Date: 18/05/2016, USB\Vid_12D1&Subclass_13&Prot_23
Using extended heuristic method...
Hardware IMEI: 020304050607080
Flash file D:\FIRMWARE HUAWEI\P40 LITE 5G\Huawei P40 Lite 5G [ Honor 30S ] CDY-NX9A hw eu CDY-N29 Cindy-N29A 10.1.1.215(C432E2R4P1)_Firmware_EMUI10.1.1_05016TW N\Software\dload\update_sd_base\UPDATE.APP
Version mismatch.
Use "Enable downgrade" action first, then retry flashing.

[Gsmserver]

Version mismatch.

Are you using the appropriate firmware for this version of your phone?
In case of newer security zone versions, the software test point won't function. It's advisable to use the hardware test point for new security versions.

[salvo1278]

t would be possible to tell the developers to add new security features like this in the next updates, it would be a good update, no longer open the phone to do testpoints, don't abandon Huawei!!