Installing boot9strap (USM)


For support in English, ask for help at Nintendo Homebrew on Discord.
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Required Reading

In order to exploit the SAFE_MODE firmware of our system, we need to inject an exploited WiFi profile.

We can do this using an existing exploit, BannerBomb3.

To accomplish this, we use your system’s encryption key (movable.sed) to build a DSiWare backup that exploits the system in order to inject the exploited WiFi profile to your connections list.

Once the WiFi profile has been injected, we will use SAFE_MODE, which is a recovery feature present on all 3DS consoles, to activate the exploited WiFi profile.

These instructions work on USA, Europe, Japan, and Korea region consoles as indicated by the letters U, E, J, or K after the system version.

If your (Right/Left Shoulder), (D-Pad Up) or (A) buttons do not work, you will need to use a Legacy Method. For assistance with this matter, join Nintendo Homebrew on Discord and ask, in English, for help.

What You Need

Section I - Prep Work

  1. If your device is powered on, power off your device
  2. Open unSAFE_MODE-bb3 tool on your computer
    • If this site is nonfunctional, try using this one
  3. Upload your movable.sed using the “Choose File” option
  4. Click “Download unSAFE_MODE-bb3 archive”
    • This will download an exploit DSiWare called F00D43D5.bin and a SAFE_MODE exploit data file called usm.bin inside of a zip archive (unSAFE_MODE-bb3.zip)
  5. Insert your SD card into your computer
  6. Copy boot.firm and boot.3dsx from the Luma3DS .zip to the root of your SD card
    • The root of the SD card refers to the initial directory on your SD card where you can see the Nintendo 3DS folder, but are not inside of it
  7. Copy usm.bin from unSAFE_MODE-bb3.zip to the root of your SD card
  8. Navigate to Nintendo 3DS -> <ID0> -> <ID1> -> Nintendo DSiWare on your SD card
    • The <ID0> will be the same one that you used in Seedminer
    • The <ID1> is a 32 character long folder inside of the <ID0>
    • If Nintendo DSiWare does not exist, create it inside of the <ID1>
  9. If there are any existing DSiWare backup files (<8-character-id>.bin) in this folder, move them to your PC
    • This will leave you with an empty Nintendo DSiWare folder. Moving the files to your PC ensures you don’t delete any intentional backups
  10. Copy the F00D43D5.bin file from unSAFE_MODE-bb3.zip to the Nintendo DSiWare folder

Section II - BannerBomb3

  1. Reinsert your SD card into your device
  2. Power on your device
  3. Launch System Settings on your device
  4. Navigate to Data Management -> DSiWare
  5. Click on the SD Card section
    • Your bottom screen should flash Red and then the system will reboot to home menu a few seconds later. This means the exploit profile was successfully copied
    • If the bottom screen does not flash Red, the exploit profile was not copied and you will not be able to complete the next section. Ensure that your files are properly placed, then try again
  6. Power off your device

Section III - unSAFE_MODE

  1. With your device still powered off, hold the following buttons: (Left Shoulder) + (Right Shoulder) + (D-Pad Up) + (A), then press (Power)
    • Keep holding the buttons until the device boots into Safe Mode
  2. Press “OK” to accept the update
    • There is no update. This is part of the exploit
  3. Press “I accept” to accept the terms and conditions
  4. The update will eventually fail, with error code 003-1099. This is intended behaviour
  5. When asked “Would you like to configure Internet settings?”, select “Yes”
  6. On the following menu, navigate to Connection 1 -> Change Settings -> Next Page (right arrow) -> Proxy Settings -> Detailed Setup
  7. Once you see B9S install SUCCESS on the top screen, press any button to reboot to Luma Configuration

Section IV - Configuring Luma3DS

  1. Your device should automatically show the Luma 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

Section V - Restoring WiFi Configuration Profiles

  1. Launch System Settings on your device
  2. Navigate to Data Management -> DSiWare
  3. Click on the SD Card section
    • Your bottom screen should flash Green and then the system will reboot to home menu a few seconds later. This means your WiFi configuration profiles were successfully restored
  4. Power off your device
  5. Insert your SD card into your computer
  6. Navigate to Nintendo 3DS -> <ID0> -> <ID1> -> Nintendo DSiWare on your SD card
  7. Delete F00D43D5.bin from your Nintendo DSiWare folder

Continue to Finalizing Setup