Question [Q] some help regarding unlocking

i have samsung i337MVLUFNE1 4.4.2, now the problem is i have no idea how to unlock i used to know that one way where you unlock your phone with the hidden menu and it's not working anymore.

I never seen FNE1 here is it different ? i dont know which modem is this can you help me out and tell me which modem does it has and can i do it for free or i have to buy the code?
device : diamond 3700 a.ka. diam100
hspl:1.93 olinex
rom: pakis rom + midnight cherry pie build neopeek based
kernel : default