This is an old guide... might update if I have the free time but be careful... Follow this instead So the latest Luma3DS patched AGB and TWL firm to boot GBA and DSiWare games! If you'd like to reinstall the regular Firms, use this tutorial! Before Reading... I am not responsible for any bricks as this tutorial is about deleting CIA's from the NAND and reinstalling them. (This is a tutorial edited a little bit to show exactly what I did- not what Nephiel originally wrote. The CIA's are only for USA consoles right now, read the comments for more instructions/info from Nephiel and a few others) Make sure you are not using a bootmanager (Decrypt9, CtrBootManager9) with Luma3DS or you'll have to change Luma3DS's path (check Luma's Wiki if you NEED to) Tested: Not tested: 1. Using the SysUpdater CIA with the AGB and TWL Firm CIA's in the updates folder and using the downgrade option. 2. Updating through system settings? Not sure if this would patch it to be normal again.