Does it help to sim unlock

[MeatPopsicle]

I've been trying to use cooked roms for awhile but 98% dont even work and the ones I get to work dont work very well I've been doing some reading on here and read that someone had luck with also sim unlocking and changing radio's, is it going to help?
I know it's only $20 but I could always use that for something else but if will make cooked roms work then it's worth it
Thanks for your help