Configuring a Lumia for Flight Signing

In this article we will discuss how to configure a Lumia for Flight Signing.

As of 2017, the old Windows Insider application has been shut down, and thus hacks are required to enable Flight Signing on devices.

Preparations

  • WPinternals must be installed on the target computer with the resources to unlock the phone bootloader prepared.
  • OSFMount must be downloaded in order to modify a partition.
  • A copy of the SbcpFlightToken.p7b must be downloaded.

Bootloader Spec A

Primary method (Easiest)
  • Unlock the device using WPinternals.
  • Go to mass storage mode
  • Paste the token file into EFIESP\efi\Microsoft\Boot\policies\
  • Reboot the phone
Alternative method to not cause issues with delta packages (CBSU/SPKU)

If you do not want interferences with updates caused by a patched mobilestartup.efi file, you can proceed to the following:

  • Unlock the device using WPinternals.
  • Go to the dump section of WPinternals, select the path to your device FFU file.
  • Select a destination path for the EFIESP partition.
  • Dump
  • Mount the EFIESP.bin file you just dumped via WPinternals via OSFMount (make sure you disable read only and use Direct writing mode)
  • Paste the token file into EFIESP\efi\Microsoft\Boot\policies\
  • Unmount EFIESP.bin via OSFMount
  • Go to the flash section of WPinternals
  • Scroll down to the flash partition manually area
  • Select your modified EFIESP.bin file
  • Flash
  • Reboot the phone

Bootloader Spec B

  • Go to the dump section of WPinternals, select the path to your device FFU file.
  • Select a destination path for the EFIESP partition.
  • Dump
  • Mount the EFIESP.bin file you just dumped via WPinternals via OSFMount (make sure you disable read only and use Direct writing mode)
  • Paste the token file into EFIESP\efi\Microsoft\Boot\policies\
  • Unmount EFIESP.bin via OSFMount
  • Go to the flash section of WPinternals
  • Scroll down to the flash partition manually area
  • Select your modified EFIESP.bin file
  • Flash
  • Reboot the phone