Huawei P8 lite ALE-L21 unlocked, but image verification error...

[tajadela]

I have a p8 lite unlocked, I need to root. Via adb I would like to install the recovery twrp with the command fastboot flash recovery twrp.img, but I always get the error "FAILED (remote: image verification error)". I have tried different versions of twrp, but always the same error

thanks for help!

firmware version B583 6.0

unlocked bootloader:
C: ab> fastboot oem get-bootinfo
...
(bootloader) unlocked
OKAY [0.002s]
finished. total time: 0.002s

[wwwindisch]

Dear Community,
I had my P8 lite ALE-L21 running nicely with LineageOS, until it crashed all out of the sudden (it was literally in my pocket) with the error

ERROR MODE
Func NO : 8 (hifi image)
Error NO : 1 (security verify failed)

I used DC Phoenix for a complete full repair as empty board. Afterwards flashed the stock rom from SD-Card (UPDATE. APP in dload folder). It worked, so far (phone boots). My next step back to Lineage OS wold be reinstalling TWRP. And this is where I fail. The bootloader is successfully unlocked, according to

oem lock-state info

but I always end up with the following error, when I try to flash the new recovery image:

Sending 'recovery' (27358 KB) OKAY [ 1.084s]
Writing 'recovery' FAILED (remote: 'image verification error')

I've tried many different TWRP Images.... it's always the same. The only recovery image that I can flash is the one extracted from the UPDATE .APP of the stock rom.

I assume that the issue might be related to the stored phone information. I had to rewrite it with the HCU client, since it was all gone after the full repair. My current values:

IMEI: #######.... (secret)
IMEI 2: same as IMEI
SN: #####..... (secret)
Model: ALE-L21
Vendor: hw
Country: eu

Are these values correct?

After further searching & reading, it looks almost, as if the bootloader is somehow in “Verified” state.

Is that possible, although fastboot oem lock-state info says "unlocked" for FB and USER lock state?

I've furthermore figured out, that fastboot flash rescue_recovery TWRP .img seems to flash the TWRP rescue image successfully. But what is "rescue_recovery"; where did the flashed image go to? Booting to recovery and erecovery after flashing rescue_recovery with TWRP both still took me to the stock version...

Could you please help me with some additional information on how fastboot determines, whether an image is valid or not? So far, it's just a black box, which tells me only "It doesn't work!"
Maybe you can help me by pointing in the right direction on how to dig deeper. Thanks a lot in advance!

[meubeukeu]

Hi !



I encounter exactly same problem with my ALE-L21C150B564


I unlocked bootloader with PotatoNV and i did not pay attention but defaults options change the factory unlock code !


I hopefully saved PotatoNV output ... then i restored original unlock code (factory key)




With original factory unlock code, flashing recovery is working



Thanks !