Bootloader

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

Bootloader Spec A

Primary method (Easiest)
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:

Bootloader Spec B