Stuck in fastboot. Can't access eRecovery.

[blahblah31415]

Hi all,

Please help me!
I think i messed up pretty badly here. I tried downgrading from Oreo to Nougat but I think I tried to install a wrong image. Now when i boot i get:

ERROR MODE
Attention! Please update system again

Error!
Fun NO : 15 (bl31 image)
Error NO : 1 (security verify failed)

I've tried the dload method but it doesn't even start. I boot it up holding power, vol+, vol-, and it gets stuck at "your device is booting now."

I can't access twrp, even after flashing it again.
I can get into fastboot and I've tried manually flashing images from an update.app, but after that, the same problem still persists. Trying to relock the boot loader gives an error "command not allowed"

Does anybody have any ideas?

 

[Gamkutopolowk]

yes i have same because battery is not dead still wait battery remain if dead then plug against work fastboot need firmware rollback version only C432B185 try HWOTA this is the best

 

[blahblah31415]

yes i have same because battery is not dead still wait battery remain if dead then plug against work fastboot need firmware rollback version only C432B185 try HWOTA this is the best

So you're saying that I wait until my battery drains, then go into fastboot and roll back to C432B185? Maybe you could help me by outlining the steps to flash via fastboot?

 

[Gamkutopolowk]

flash via fastboot by HWOTA follow this link https://romprovider.com/2018/01/download-install-b185-nougat-update-huawei-p10-plus/
only method 1

 

[blahblah31415]

flash via fastboot by HWOTA follow this link
only method 1

So i tried this method, but it didn't work. It flashes TWRP, and instructs me to disconnect the USB cable and boot into TWRP, but i can't boot into TWRP. It goes directly to the error message even when holding the buttons down.

 

[Gamkutopolowk]

because stuck in fastboot is freeze or corrupted still wait battery drains when dead battery hold vol down + plug USB then run in HWOTA...............

 

[blahblah31415]

because stuck in fastboot is freeze or corrupted still wait battery drains when dead battery hold vol down + plug USB then run in HWOTA...............

So after waiting for the battery to drain, holding vol down, and plugging the USB, I'm back where I was before with being in fastboot. Running HWOTA results in the same problem for when it tells me to reboot to TWRP after install, the phone goes to error mode.
I'm pretty sure the bl31 image corruption is preventing me from booting into recovery.

 

[Gamkutopolowk]

try other methode if work or not run fastboot need files from huawei firmware extractor open Update.app save files boot.img + recovery.img + system.img
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img
Test it

 

[blahblah31415]

try other methode if work or not run fastboot need files from huawei firmware extractor open Update.app save files boot.img + recovery.img + system.img
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img
Test it

Ok so i flashed boot.img, recovery.img, system.img all OKAY.
Reboot and i get the same error..

The problem is with the bl31 image, which is in ARM Trusted Firmware.
Maybe if i could figure out how to flash TRUSTFIRMWARE.img that would work. I tried this, but it doesn't work. I don't know the partition name.

fastboot flash trustfirmware
unknown partition 'trustfirmware'

 

[Gamkutopolowk]

Try HWOTA flash TWRP then hold power + vol up stay hold vol up long 15 seconds

 

[blahblah31415]

Try HWOTA flash TWRP then hold power + vol up stay hold vol up long 15 seconds

Still goes straight to the error screen.

 

[Gamkutopolowk]

Still goes straight to the error screen.

Please show me your mobile

 

[Junaid Shafi]

Ok so i flashed boot.img, recovery.img, system.img all OKAY.
Reboot and i get the same error..

The problem is with the bl31 image, which is in ARM Trusted Firmware.
Maybe if i could figure out how to flash TRUSTFIRMWARE.img that would work. I tried this, but it doesn't work. I don't know the partition name.

fastboot flash trustfirmware
unknown partition 'trustfirmware'

thank you sir u saved my phone from drowning just flashed this trustedfirmware and hurray my phone got out of error mode

 

[davidwar]

thank you sir u saved my phone from drowning just flashed this trustedfirmware and hurray my phone got out of error mode

How you did that?

 

[gonzalomorenorovetto]

Hi all,

Please help me!
I think i messed up pretty badly here. I tried downgrading from Oreo to Nougat but I think I tried to install a wrong image. Now when i boot i get:

ERROR MODE
Attention! Please update system again

Error!
Fun NO : 15 (bl31 image)
Error NO : 1 (security verify failed)

I've tried the dload method but it doesn't even start. I boot it up holding power, vol+, vol-, and it gets stuck at "your device is booting now."

I can't access twrp, even after flashing it again.
I can get into fastboot and I've tried manually flashing images from an update.app, but after that, the same problem still persists. Trying to relock the boot loader gives an error "command not allowed"

Does anybody have any ideas?

Hi
I have the exact same problem
After trying all of the methods I found (dload, HWOTA, TWRP, etc), I finally took the phone to the service center.
They told me it was an easy fix, then they called me and told me that probably they were going to replace the motherboard
I'm still waiting for them to call me for confirmation.
If you got any news on this, please keep posting
Thanks!

 

[blahblah31415]

Hi
I have the exact same problem
After trying all of the methods I found (dload, HWOTA, TWRP, etc), I finally took the phone to the service center.
They told me it was an easy fix, then they called me and told me that probably they were going to replace the motherboard
I'm still waiting for them to call me for confirmation.
If you got any news on this, please keep posting
Thanks!

I actually ended up using dc pheonix to fix it. It worked perfectly. I had to pay about 15 dollars for credits. It used some sort of backdoor and flashed a new ROM from scratch.

 

[gonzalomorenorovetto]

I actually ended up using dc pheonix to fix it. It worked perfectly. I had to pay about 15 dollars for credits. It used some sort of backdoor and flashed a new ROM from scratch.

I tried DC Phoenix and It did not work. They returned me my money.
At the service center they finally replaced my motherboard, in warranty, even though the phone was unlocked and I bricked it completely