Unlocking Bootloader is stuck on Error 0x1106: Security header validation failed

Description

I followed this guide: https://woa-project.github.io/LumiaWOA/guides/unlock/ The last step before “We’re done” resulted in the error Error 0x1106: Security header validation failed and since then I cannot do anything with the phone.

Trying to boot the old OS results in a Bitlocker being displayed which wants me to provide an USB stick with recovery files.

Also the Windows Device Recovery Tool is not able to do anything. After it detects the phone, it states that there is no space on the disk (sorry for the screenshot being in German).

Find the WPInternals.log attached.

Steps To Reproduce

1. See link in description. I can’t add more details.

Expected behavior

At the moment I would be happy being able to flash the original FFU back to the device.

THANK YOU VERY MUCH FOR YOUR SUPPORT!

WPinternals Version

2.9.7894.11970

Windows Version

Edition Windows 10 Pro Version 21H1 Installiert am ‎26.‎06.‎2020 Betriebssystembuild 19043.1237 Leistung Windows Feature Experience Pack 120.2212.3530.0

Phone model

Lumia 950 XL (RM-1085)

Relevant Assets

WPInternals.log

[gus33000]

Put the phone in flash mode Close WPinternals Position yourself in a folder with the thor2.exe tool (it’s included with WDRT)

Run this command: thor2 -mode rnd -boot_edmode

Assuming you used WPinternals download function, you should have these paths matching except for model, if not, you’ll have to download manually from lumiafirmware:

thor2 -mode emergency -hexfile C:\ProgramData\WPInternals\Repository\RM-1104\MPRG8992_fh.ede -edfile C:\ProgramData\WPInternals\Repository\RM-1104\RM1104_fh.edp

Replace RM1104 and RM-1104 and 8992 with what matches for your phone, you can get both files here: https://www.lumiafirmware.com/ (just input your product code and download them in the emergency section.

Then you should be able to flash ffus

To recap:

1. Click “interrupt the boot sequence” in wpinternals to go to flash app
2. reboot the device and keep it connected
3. CLOSE wpinternals once flash app appears (arrows at the top on the phone screen)
4. open command prompt
5. cd c:\Program Files (x86)\Microsoft Care Suite\Windows Device Recovery Tool
6. thor2 -mode rnd -boot_edmode
7. thor2 -mode emergency -hexfile C:\ProgramData\WPInternals\Repository\RM-1085\MPRG8994_fh.ede -edfile C:\ProgramData\WPInternals\Repository\RM-1085\RM1085_fh.edp
8. close command prompt
9. Use WDRT

[infevlol]

THANK YOU!!! You helped me unbrick my Lumia 635 after all these months!!! Hope you have the greatest life anybody on this planet has ever had!!! <3333