Necessary for installing non-official software like LineageOS to ensure the device can boot without security interference. How to Use It

Version 3.1 was a turning point because Samsung introduced in the One UI 3.1 update. Earlier versions (1.x, 2.x) would fail on devices like the Galaxy S21 or Galaxy Tab S7. Version 3.1 added:

Multidisabler-samsung-3.1.zip is a critical script used by the Android modding community to "prime" Samsung devices after installing a custom recovery like TWRP Recovery . Originally created by developer

You must have an unlocked bootloader and a custom recovery (like TWRP) installed.