If you don't have godmode9 already, get it here
- Copy GodMode9.firm from the GodMode9 .zip to the /luma/payloads/ folder on your SD card
- Boot your device while holding (Start) to launch the Luma3DS chainloader menu
- Launch GodMode9 by pressing (A)
- Navigate to [1:] SYSNAND CTRNAND -> data -> (32 Character ID) -> sysdata -> 00010038
- Hold down the (R) trigger, then press (X) on 00000000 to rename this file
- Press (Up) once to change the name to 10000000
- Press (A) to save changes
- Press (A) to unlock SysNAND writing, then input the key combo given
- Navigate back to the Main Menu
- Press (Start) to reboot your device