P10 VTR-L09 - No Recovery - EMUI 8.0.0.386 - Can't unlock

[albertst]

Hello,

I bought a DC Phoenix/HCU 3 Days Subscription with the intention of fixing my P10 phone and unlock the bootloader.
I managed to downgrade from EMUI 9 to EMUI 8.0 (not using DC Phoenix/HCU). I can boot to EMUI 8.0, but I am unable to unlock the bootlaoder (HCU says it is not supported)

Firmware ver.: System 8.0.0.046(0SWO)
Dataver: VTR-L09 8.0.0.386(C432)_DATA_VTR-L09_hw_eu
FASTBOOT:Chipset-chicago8.0.0.6(081T)_FASTBOOT
BOOT:System 8.0.0.046(0SWO)_BOOT
RECOVERYunknow)
SYSTEM:System 8.0.0.046(0SWO)
MAINVER:System 8.0.0.046(0SWO)
DATAVER:VTR-L09 8.0.0.386(C432)_DATA_VTR-L09_hw_eu
APTIME:Thu Feb 28 14:22:02 CST 2019

Current security patch not supported!

DC Phoenix in Fastboot mode : "Recovery partition not found"

If I boot the phone with VolUP + Vol Down, but then I get a message "Updating 5%' and never progresses.
If I try to boot to fastboot (Vol UP), I get 'Your device has loaded a different operating system. To leanr more visit: http://zh.ui.vmall.com/emotiondownload.php?mod=restore"

My goal is to unlock the bootloader. or a refund if nothing will work ?

[Valdemaras]

You would need to flash board software into it, then repair it on hcu, then read bootloader, then flash full stock rom, then can use that code for unlock.

[albertst]

how can I flash the board software? I thikn that can only be done when the phone appears in windows as 'USB SER" or "USB COM 1.0"? WhenI tried to downgrade, the phone was in that state without using the test point. Is there maybe a way to do that again wihtout opening the phone?

[gsmgeo]

how can I flash the board software? I thikn that can only be done when the phone appears in windows as 'USB SER" or "USB COM 1.0"? WhenI tried to downgrade, the phone was in that state without using the test point. Is there maybe a way to do that again wihtout opening the phone?

No, it’s impossible to get the bootloader unlock code without a testpoint. You will have to disassemble the phone, download the service firmware https://androidhost.ru/29Lw
as well as board firmware from Dc Phoenix support
VTR-Downgrade-Board-A067-7.0.0_r1.dgtks