So I'll put my question here, as someone created a topic with this question.
"So I bought a friends 3DS XL (Older model) last day, and I was thinking about doing a factory reset on it, just so I can make it my own with friends and things like that. The 3DS is on version 11.4, I have Luma installed and if I press start when powering the 3DS it shows Godmod9.
My friend installed the softmod last year, but didn't play his 3DS too much, so there's a lot of things that need update. (I did update my Freeshop, as I wasn't able to download Pokémon Ultra Sun on 2.2 of freeshop.)
I'm really bad with this stuff and I don't want to make mistakes, brick it or even lose the CFW, as right now I can't buy an flashcard, so it's safe to factory reset it as I have seen? And after that, what should I do to make things work again?"
Reading this topic, it's safe to assume that I can factory reset it, so what steps should I take to put everything again? Would I need a flashcard, or I just need to install FBI?