Mate 20 X EVR-L29 Flashing Cust and Preload partitions using fastboot

[hsarao]

My phone is Mate 20 X EVR-L29 C636. Like many of us, I received an OTA EMUI10 update 10.0.0.180. It resulted in Soft brick. I have access to erecovery and fastboot.

Thanks to efforts of lot of people on this forum, many people successfully unbricked their phone using dload method with recently released 10.0.0.180 build. I have family pictures on phone, which I do not want to lose using dload method.

I checked my build number using fastboot and it says EVR-L29 9.1.0.347(C636E3R1P11). Thanks to @thunderbolt128. He thinks that my phone's CUST and vendor partitions are still 9.1. May be the other partitions upgraded to EMUI 10. My question is it possible to flash CUST and vendor partitions using any method (may be fastboot flash?) without erasing user data? I can perhaps using "EMUI extractor" to extract images and try flashing them. My problem is that I always had Samsung Notes and I do not know the partition layout of Huawei Mate 20 x. Any help and suggestions are welcome.

PS C:\platform-tools> .\fastboot.exe oem get-build-number
(bootloader) :EVR-L29 9.1.0.347(C636E3R1P11)
OKAY [ 0.016s]
Finished. Total time: 0.033s
PS C:\platform-tools> .\fastboot.exe getvar vendorcountry
vendorcountry: hw/spcseas
Finished. Total time: 0.020s
PS C:\platform-tools> .\fastboot.exe oem get-bootinfo
(bootloader) locked
OKAY [ 0.004s]
Finished. Total time: 0.018s
PS C:\platform-tools> .\fastboot.exe getvar rescue_enter_recovery
getvar:rescue_enter_recovery FAILED (remote: 'FAIL:need all image flashed!')
Finished. Total time: 0.033s
PS C:\platform-tools>

 

[jbmc83]

My phone is Mate 20 X EVR-L29 C636. Like many of us, I received an OTA EMUI10 update 10.0.0.180. It resulted in Soft brick. I have access to erecovery and fastboot.

Thanks to efforts of lot of people on this forum, many people successfully unbricked their phone using dload method with recently released 10.0.0.180 build. I have family pictures on phone, which I do not want to lose using dload method.

I checked my build number using fastboot and it says EVR-L29 9.1.0.347(C636E3R1P11). Thanks to @thunderbolt128. He thinks that my phone's CUST and vendor partitions are still 9.1. May be the other partitions upgraded to EMUI 10. My question is it possible to flash CUST and vendor partitions using any method (may be fastboot flash?) without erasing user data? I can perhaps using "EMUI extractor" to extract images and try flashing them. My problem is that I always had Samsung Notes and I do not know the partition layout of Huawei Mate 20 x. Any help and suggestions are welcome.

PS C:\platform-tools> .\fastboot.exe oem get-build-number
(bootloader) :EVR-L29 9.1.0.347(C636E3R1P11)
OKAY [ 0.016s]
Finished. Total time: 0.033s
PS C:\platform-tools> .\fastboot.exe getvar vendorcountry
vendorcountry: hw/spcseas
Finished. Total time: 0.020s
PS C:\platform-tools> .\fastboot.exe oem get-bootinfo
(bootloader) locked
OKAY [ 0.004s]
Finished. Total time: 0.018s
PS C:\platform-tools> .\fastboot.exe getvar rescue_enter_recovery
getvar:rescue_enter_recovery FAILED (remote: 'FAIL:need all image flashed!')
Finished. Total time: 0.033s
PS C:\platform-tools>

wait, if you have fastboot and adb access, why dont u just use the command line in order to manually copy over all the data from your phone to your pc/laptop?

Sent from my Huawei Mate 20 X EVR-AL00 using Tapatalk

 

[hsarao]

I only have erecovery and fastboot access. The emergency backup option in erecovery does not work neither does the safe mode boot.

Is there a way to copy data using fastboot ?

 

[jbmc83]

I only have erecovery and fastboot access. The emergency backup option in erecovery does not work neither does the safe mode boot.

Is there a way to copy data using fastboot ?

hmmmm ok, it seems like fastboot is write to device only, unfortunately. can u check if you have ADB access when ure in erecovery?

Sent from my Huawei Mate 20 X EVR-AL00 using Tapatalk

 

[hsarao]

hmmmm ok, it seems like fastboot is write to device only, unfortunately. can u check if you have ADB access when ure in erecovery?

Sent from my Huawei Mate 20 X EVR-AL00 using Tapatalk

No, ereceovery does not provide access to ADB. Has anyone checked if the EMUI 10 is available using erecovery? Some one was saying, EMUI 10 will only be available in erecovery after the stable release.

Thanks

 

[jbmc83]

No, ereceovery does not provide access to ADB. Has anyone checked if the EMUI 10 is available using erecovery? Some one was saying, EMUI 10 will only be available in erecovery after the stable release.

Thanks

yes thats true. depending on region/cust, stable release will pop up starting in december, but can potentially take until february/march....

Sent from my Huawei Mate 20 X EVR-AL00 using Tapatalk