So i got my o3ds unbanned from 022-2812. I had an emuNAND with 11.2 (sysNAND 9.2) and saved nothing but my savegames. I wanted to switch to arm9loaderhax because of the better bootrate and better compatibility and better everything. So i saved all SD-Card data, formatted it and followed this guide http://3ds.guide/ Downgrading to 2.1.0, installing arm9loaderhax, upgrading, etc. etc. I must say i deleted the emuNAND completely and changed the theme on the sysNAND to remove the bootloader (CTRbootmgr) before doing that guide. My sysNAND had no NNID linked. I can now access the eshop (friendlist appeared to be freezed because i didn't unlinked my NNID before doing the guide). But i'm still getting the 002-0102 error so i'm waiting a few days if i get unbanned. The friendlist / miiverse / eshop freezed when i first started them. Some research later i found out that you need to wait. I had to wait 40 minutes till i could access these again. I saved my old friendcodeseed and moveable just in case they got changed. Hopefully this will be useful for someone. One thing i'm too afraid to test is: "What will happen if i login with my old NNID?" It isn't banned, because i can access the Miiverse / Eshop with my Wii U and PC.