Hi, I just got a R4i 3ds 2 days ago. I was able to do the ntrboothax hack with it on the first day on a 3ds XL on 11.5. Since then None of my old 2ds or new 3ds or old 3ds can read it!
Tried to add the paper thins behind it to tried to see if the contact was not touching but no luck there…...