Installing boot9strap (HBL-USM)

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Technical Details (optional)

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

As we already have Homebrew access, we can use slotTool to do this.

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.

For a more technical explanation, see here for information about the unSAFE_MODE exploit.

Compatibility Notes

If your (Right/Left Shoulder), (D-Pad Up) or (A) buttons do not work, join Nintendo Homebrew on Discord and ask, in English, for help.

What You Need

• The latest release of SafeB9SInstaller (direct download)
• The latest release of unSAFE_MODE (direct download)

Section I - Prep Work

In this section, you will copy the files needed to trigger the unSAFE_MODE exploit onto your console’s SD card. Then, you will use Homebrew Launcher to launch slotTool, which will overwrite your Wi-Fi slots with hacked data. Your Wi-Fi connection settings will be temporarily overwritten while the exploit is active.

1. Insert your SD card into your computer
2. Create a folder named boot9strap on the root of your SD card
3. Copy boot9strap.firm and boot9strap.firm.sha from the RELEASE .zip to the /boot9strap/ folder on your SD card
4. Create a folder named 3ds on the root of your SD card if it does not already exist
   • This folder stores homebrew applications and data; it is different from the Nintendo 3DS folder that the console automatically generates
5. Copy slotTool.3dsx from the slotTool folder inside the RELEASE .zip to the /3ds/ folder on your SD card
6. Copy usm.bin from the RELEASE .zip to the root folder on your SD card
7. Copy SafeB9SInstaller.bin from the SafeB9SInstaller .zip to the root of your SD card
8. Reinsert your SD card into your console
9. Power on your console
10. Open the Homebrew Launcher through your method of choice (likely the Internet Browser)
11. Launch slotTool from the list of homebrew
    • If you get stuck on a red screen, forcefully power off the console by holding the power button for fifteen seconds, then retry this section
12. Select the “INSTALL exploit to wifi slots 1,2,3 & shutdown” option
    • You will see some on-screen text and then your system will shut down

Section II - unSAFE_MODE

In this section, you will enter Safe Mode (a feature available on all 3DS family consoles) and navigate to a menu where unSAFE_MODE will be triggered, which will launch you into the boot9strap (custom firmware) installer.

1. With your console still powered off, hold the following buttons: (Left Shoulder) + (Right Shoulder) + (D-Pad Up) + (A), and while holding these buttons together, power on your console
   • Keep holding the buttons until the console boots into Safe Mode (a “system update” menu)
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 the 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 (image)
7. If the exploit was successful, your console will have booted into SafeB9SInstaller
   • If your console instead freezes on a white screen, hold the POWER button until it turns off, then retry this section
   • If your console instead freezes on a red screen, you are missing usm.bin from the root of your SD card
   • If you get a different error, follow this troubleshooting guide

Section III - Installing boot9strap

In this section, you will install custom firmware onto your console.

1. When prompted, input the key combo given on the top screen to install boot9strap
   • If a step on the lower screen has red-colored text, and you are not prompted to input a key combo, follow this troubleshooting guide
2. Once it is complete, press (A) to reboot your console
3. Your console should have booted into the Luma3DS configuration menu
   • Luma3DS configuration menu are settings for the Luma3DS custom firmware. Many of these settings may be useful for customization or debugging
   • For the purpose of this guide, leave these options on the default settings (do not check or uncheck anything)
   • If your console shuts down when you try to power it on, ensure that you have copied boot.firm from the Luma3DS .zip to the root of your SD card
4. Press (Start) to save and reboot

At this point, your console will boot to Luma3DS by default.

• Luma3DS does not look any different from the normal HOME Menu. If your console has booted into the HOME Menu, it is running custom firmware.
• On the next page, you will install useful homebrew applications to complete your setup.

Section IV - Restoring WiFi Configuration Profiles

In this section, you will enter the Homebrew Launcher (using custom firmware) so that you can restore the Wi-Fi connection slots that were overwritten in Section I.

1. Launch the Download Play application
2. Wait until you see the two buttons
   • Do not press either of the buttons
3. Press (Left Shoulder) + (D-Pad Down) + (Select) at the same time to open the Rosalina menu
4. Select “Miscellaneous options”
5. Select “Switch the hb. title to the current app.”
6. Press (B) to continue
7. Press (B) to return to the Rosalina main menu
8. Press (B) to exit the Rosalina menu
9. Press (Home), then close Download Play
10. Relaunch the Download Play application
11. Your console should load the Homebrew Launcher
12. Launch slotTool from the list of homebrew
13. Select “RESTORE original wifi slots 1,2,3”
14. Your console will then reboot

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Continue to Finalizing Setup