i have a gateway and i have 3ds that i cant use my gateway my question is if i dont have a nand backed can i still downgrade itIf you're looking to pirate, only hope for you is downgrading to 4.5 and using the super glitchy, super buggy, unstable, and possible to brick CFW. Also don't forget that some newer games (Pokemon and such) will not work with CFW.
Without a Gateway I don't see a point in downgrading.