Installing boot9strap (SoundHax)

boot9strap (created by SciresM) is a bootrom exploit which allows you to run CFW such as Luma3DS. With a modded 3DS, you can play emulators/ROMs, run backups of 3DS and DS games from a memory card, install custom themes for the home screen, stream from a PC, download and install cheats etc.

What you’ll need
  • SD Card (16GB+ recommended)
  • The latest release of Soundhax (for your region, device, and version)
    • If Soundhax appears in your browser as an unplayable video, press Ctrl+S or Cmd+S to save it to your computer
  • The latest release of SafeB9SInstaller
  • The latest release of boot9strap
  • The latest release of Luma3DS
  • The latest release of universal-otherapp
SD Preparation
  • Insert your SD card into your PC
  • Copy those files to the root of your SD Card
    • The Soundhax .m4a file
    • The otherapp.bin file
    • The boot.firm and boot.3dsx from the Luma3DS .zip
    • The SafeB9SInstaller.bin file from the SafeB9SInstaller .zip
  • Create a folder named boot9strap on the root of your SD card
    • Copy boot9strap.firm and boot9strap.firm.sha from the boot9strap .zip to the /boot9strap/ folder on your SD card
  • Reinsert your SD card into your 3DS
Launching SafeB9SInstaller
  • Launch Nintendo 3DS Sound on your 3DS
  • Go to /SDCARD, then play “<3 nedwill 2016”
  • If the exploit was successful, you will have booted into SafeB9SInstaller
Installing boot9strap
  1. Wait for all checks to complete
  2. When prompted, input the key combo given on the top screen to install boot9strap
  3. Once it has completed, press (A) to reboot your device
Configuring Luma3DS
  1. Your 3DS should have rebooted into the Luma3DS configuration menu
  2. Use the (A) button and the D-Pad to turn on the following:
    • “Show NAND or user string in System Settings”
  3. Press (Start) to save and reboot
    • If you get an error, just continue the next page
Booting Luma3DS
  1. Launch the Download Play application , then wait until you see the Nintendo 3DS and Nintendo DS buttons
  2. Press (Left Shoulder) + (D-Pad Down) + (Select) at the same time to open the Rosalina menu
  3. Select “Miscellaneous options”, then select “Switch the hb. title to the current app.
  4. Press (B) to continue, then press (B) twice until you exit the Rosalina menu
  5. Press (Home), then close Download Play
  6. Launch the Download Play application again
    • It should now boot into the Homebrew Launcher

Congrats! You have successfully modded your 3DS system. You can now download Homebrew apps, install emulators/ROMs, play downloaded games etc.