Samsung Ativ S (samsung-i8750)

Documentation
There has been an attempt at replacing the signed bootloader of the Ativ S with the bootloader of the Samsung Galaxy S III: https://forum.xda-developers.com/showthread.php?t=2528652

See the GitHub project for more info.

UEFI exploit for non-Lumia Windows Phones: https://gus33000.me/2019/01/05/secureboot-flaw-for-all-wp-devices-literally/