I never did get an answer as to this. I know that the lowest firmware the 2DS had was around 6.0, and I don't think that you can downgrade to a firmware you never had, no?
no you cannot downgrade the 2DS, its most likely that it would only ever be down-gradable to 6.x anyway, as the 2ds uses different hardware and needs the newer revisions of the FW to accommodate this new hardware, not sure if some sort of partial downgrade solution could be achieved, but I'm fairly sure you would be pretty much tied to the main core of 6.x to use the newer hardware, and seeing as there is no full on exploit that runs at boot time all the files would have to be signed, probably the best you could do is stuff like downgrading the NDS flashcard whitelist and insignificant stuff like thatYeah, I'm curious about this too.
I'm also curious as to wether you can downgrade on an N3DS