# 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