Downgrading a DSi

So is there a way to downgrade a DSi?As in update it and then "un-update" it?

No, there is not.

yes you canGo to the Settings menu on your Nintendo DSi and select Memory
Choose Format System Memory and then press Initialize System
Touch the Format button to perform the system reset on your Nintendo DSi. Once complete, your DSi will have been downgraded back to its factory condition with no updates, add-ons or extra

Replying to #3

That's three different threads you've said the same answer.
Just stop.You cannot.

well that worked for me

Replying to #5

Check again, cause you'll then realize that you're hallucinating. You'd merely reset your system settings, not reverting to the previous firmware version.

sound like a troll but maybe will works on 3ds as well but i don't wana downgrade my sistem since i got demo's app and ecc.

it wont work. What would be the point in nintendo blocking flashcarts with firmware updates if people could just circumvent the block by restoring their DS to factory condition?