What You Need

  • A magnet that triggers the sleep mode of your device (if using a folding style device)
  • Your ntrboot flashed flashcart
  • The latest release of SafeB9SInstaller
  • The latest release of boot9strap (standard boot9strap; not the devkit file, not the ntr file)
  • The latest release of Luma3DS (the .7z file)
  • The latest release of the Homebrew Launcher

Instructions

Section I - Prep Work

  1. Power off your device
  2. Insert your device’s SD card into your computer
    • This is the SD card from your 3DS, not the SD card from your flashcart
  3. Copy SafeB9SInstaller.firm to the root of your SD card and rename it to boot.firm
  4. Copy boot.3dsx to the root of your SD card
  5. Create a folder named boot9strap on the root of your SD card
  6. Copy boot9strap.firm and boot9strap.firm.sha from the boot9strap .zip to the /boot9strap/ folder on your SD card
  7. Reinsert your SD card into your device
  8. Power on your device

Section II - ntrboot

  1. Use the magnet to find the spot on your device where the sleep sensor is triggered
    • This step is not needed on the old 2DS (which has a sleep mode switch)
  2. Power off your device
  3. Insert your flashcart into your device
  4. Place the magnet on your device to trigger the sleep sensor
    • On old 2DS, you should instead enable the sleep mode switch
  5. Hold (Power) + (Start) + (Select) + (X) for several seconds, then release the buttons
    • It may take a few attempts to get this to work because the positioning is awkward
  6. If the exploit was successful, you will have booted into SafeB9SInstaller

Section III - Installing boot9strap

  1. Wait for all safety checks to complete
  2. Remove the magnet from your device
    • On old 2DS, you should instead disable the sleep mode switch
  3. When prompted, input the key combo given to install boot9strap
  4. Once it has completed, force your device to power off by holding down the power button
    • Your device will only boot to the SafeB9SInstaller screen until the next section is completed

Section IV - Configuring Luma3DS

  1. Insert your SD card into your computer
  2. Delete boot.firm from the root of your SD card
  3. Copy boot.firm from the Luma3DS .7z to the root of your SD card
  4. Reinsert your SD card into your device
  5. Power on your device
  6. Your device should have booted into the Luma3DS configuration menu
  7. Use the (A) button and the D-Pad to turn on the following:
    • “Show NAND or user string in System Settings”
  8. Press (Start) to save and reboot
    • If you get an error, just continue the next page