Well, hello, I just attempted my first 11.X downgrade with great succed, save for one little thing. Somehow my NNID got blocked and now the infamous messages "This ID cannot be used in this system" and "This ID is already linked no another 3DS system" shows up. Besides contacting Nintendo, is there anything I can do to get my ID back? I still have the downgraded 3DS with me for a few days so... I'm open up to options and whatever you want to say. Few notes: - I formatted both consoles with the internal 3DS option, not TinyFormat - I backed up my games, saves and NAND but restoring it does nothing.