Huawei P20 - EML-L29 Convert to demo mode

[D4v0r]

Hello!
I'm trying to convert the Huawei P20 EML-L29, from a Demo/Retail mode to a complete firmware.
Using Testpoint, i'm able to upload the bootloader : Kirin970_T2_A8.1_V5.
On OEMINFO Tab i select EML-L29 , then i enter - Model : EML29 - Vendor : hw - Country : normal
Then asks for fastboot mode.
I put phone in Fastboot, and this happen ->

DC Phoenix 0.0.0.105
user:d4v0r

Device detected:
COM17: HUAWEI USB COM 1.0 (COM17)
BOOTLOADER File to update: Kirin970_T2_A8.1_V5
OEM File to update: EML-L29
22/07/2019 10:35:43 Starting to write device...

Process identifier:17041787


Writing bootloader...
Writing Kirin970_T2_A8.1_V5_3.dtwork...
Writing Kirin970_T2_A8.1_V5_4.dtwork...
Writing Kirin970_T2_A8.1_V5_5.dtwork...

Waiting for fastboot device...
Device found: UBV7N18307000033


Looking for a device in fastboot mode
Device found: UBV7N18307000033


Getting IMEI...
Getting build number...
Getting model ...
Getting battery state...
Getting backdoor info...
Getting lock state info...
Getting lock boot info...

SN:UBV7N18307000033
IMEI: ********************
IMEI1: ********************
MEID: ********************
Build number: :EML-L29 8.1.0.107D(EUC652)
Model: EML-L29
Battery state: 4623mv
OEM lock state info:
FB LockState: LOCKED
USER LockState: LOCKED
OEM get bootinfo:
locked

Writing OEMINFO partition
OEMINFO partition UPDATE :FAIL Command not allowed

Update fastboot mode failed
22/07/2019 10:37:12 Writing device finished - INCOMPLETE

What am i doing wrong?
Thanks,
D4v0r

[Valdemaras]

Most likely incorrect/not suitable loader. If it wasn't updated you may be able to repair model/country/vendor without fashing.