You may already have this from a earlier section in the guide.
Place FBI.3dsx into sd:/3ds/
Create the folder sd:/cias/
Place FBI.cia, Universal-Updater.cia, Anemone3DS.cia, ftpd.cia, hblauncher_loader.cia, and Checkpoint.cia into sd:/cias
Create the folder sd:/luma/payloads/
Copy GodMode9.firm from the GodMode9 zip file into sd:/luma/payloads/
Copy the gm9 folder from the GodMode9 zip file to the root of your sd card
Eject the SD card from your computer, then remove it
Reinsert the SD card into your console
Section II - CFW Check
Hold SELECT, and while holding SELECT, power on the console
If the check was successful, your console should have booted into the Luma3DS configuration menu
Press START to save and reboot
Power off your console
If you do NOT boot into the Luma3DS configuration menu, custom firmware was not installed on your console. Join the Nintendo Homebrew Discord and ask, in English, for help
Section III - Updating the System
Update your console by going to System Settings, then “Other Settings”, then going all the way to the right and using “System Update”
Updates while using B9S + Luma (what you have) are safe
The updater may display a message saying “Your system is up to date” instead of updating. This is normal if you are already up to date; continue to the next section
If this gives you an error, set both your DNS settings and Proxy settings to “Auto”
Press L+↓+SELECT at the same time to open the Rosalina menu
If one of these buttons is broken, download this config.ini and put it in sd:/luma, replacing the existing one. This will change the Rosalina menu key combination to X+Y
Select “Miscellaneous options”
Select “Dump DSP firmware”
Press B to continue
Select “Nullify user time offset”
Press B to continue
Press B to return to the Rosalina main menu
Press B to exit the Rosalina menu
Section V - CIA Installation
Open the Activity Log
Press L+↓+SELECT at the same time to open the Rosalina menu
Select “Miscellaneous options”
Select “Switch the hb title to the current app”
Press B to continue
Press B twice to return to the Rosalina main menu
Press B to exit the Rosalina menu
Close Activity Log
Reopen Activity Log
This should open the Homebrew Launcher
Open FBI from the list of homebrew
Select SD, then click cias
Select the Current directory option, then choose to Install and delete all CIAs
Close FBI
Six new applications should be on the home menu.
Section VI - NAND Backup and CTRNAND Luma/GM9
Power off your console
Press and hold Start, and while holding Start, power on your console. This will launch GodMode9
If you do not boot into GodMode9, ensure that you copied GodMode9.firm into sd:/luma/payloads/ and that the folders are not misnamed (e.g. luna, lumas, playloads, payload.)
If you are prompted to create an essential files backup, press A to do so, then press A to continue once it has completed.
If you are prompted to fix the RTC date&time, press A to do so, then set the date and time, then press A to continue.
Press Home to bring up the action menu
Select Scripts…
Select GM9Megascript
Select Backup Options
Select SysNAND Backup
Press A to confirm
The NAND backup process may take up to 20 minutes.
Press B to exit to the main menu of GM9Megascript
Select Scripts from Plailect’s Guide
Select Setup Luma3DS to CTRNAND
When prompted, press A to proceed
Press A to unlock writing to SysNAND (lvl1), then input the key combo given
Press A to continue
Press B twice to exit GM9Megascript
Hold R and press START to power off your console
Insert your SD card into your computer
Copy the contents of sd:/gm9/out/ to a safe location on your computer
These files are critical backups and should be backed up to multiple locations (i.e. cloud storage) if possible
The two SysNAND files are your NAND backup and can be used to revert your console to a working state if it is bricked by a software issue
The essentials.exefs file contains your console’s system-unique files and can be used to recover your data in the event of a hardware failure
If you still have them, delete the two SysNAND files from sd:/gm9/out/ from your SD card
The essential.exefs file is small and may be kept on your SD card for ease of access
You’re done! Custom firmware is now fully configured on your console.
Information and Notes
Here are some key combos that you should know:
Holding SELECT on boot will launch the Luma3DS configuration menu.
Holding START on boot will launch GodMode9, or if you have multiple payloads in sd:/luma/payloads/, the Luma3DS chainloader.
By default, pressing L+↓+SELECT while in 3DS mode will open the Rosalina menu, where you can check system information, take screenshots, enable cheats, and more. This can be changed from the Rosalina menu.
If you have a modified Luma config, this key combination may be X+Y instead.
Holding START+SELECT+X on boot will make the notification LED show a color for debug purposes. See here for what each color means.
See here for some suggestions on things to do with custom firmware.
