Question [Q] Downgrade bootloader is

I've found this about downgrade bootloader:

My question is:
Is anybody who knows how to modify older bootloader to bypass verification during uploading by ODIN?
Samsung S4 mini i9195 the best 4.3" two-core Droid, Antutu v4 OC 22700, but without USB host, MHL and other things!!! Bloody fu....g Samsung!!!
- Otherwise I don't understand why Android/iOS/WP are so popular they are totally useless without root. They haven't got basic things like old good Symbian!