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title: "Installing boot9strap (safecerthax)"
---

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### Lectura requerida

safecerthax is compatible with all Old 3DS and Old 2DS devices in all regions.

If your (Right/Left Shoulder), (D-Pad Up) or (A) buttons do not work, or your ISP is rerouting DNS changes, you will need to use an alternate method, like [Installing boot9strap (Browser)](installing-boot9strap-(browser)).
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This exploit will not work on the New 3DS, New 3DS XL, or New 2DS XL. Please ensure that the device you are modding is an Old 3DS, Old 3DS XL, or Old 2DS before continuing.
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### Qué necesitas

* La última versión de [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/latest)
* The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/latest) *(`boot9strap-1.3.zip`; not the `devkit` file, not the `ntr` file)*
* La versión más reciente de [Luma3DS] (https://github.com/LumaTeam/Luma3DS/releases/latest) 

### Instrucciones

#### Sección I - Preparativos
1. Apaga tu consola
1. Inserta tu tarjeta SD en tu computadora
1. Copia los archivos `boot.firm` y `boot.3dsx` desde el `.zip` de Luma3DS a la raíz de tu tarjeta SD
1. Crea una carpeta llamada `boot9strap` en la raíz de tu tarjeta SD
1. Copy `boot9strap.firm` and `boot9strap.firm.sha` from the boot9strap `.zip` to the `boot9strap` folder on your SD card
1. Copy `SafeB9SInstaller.bin` from the SafeB9SInstaller `.zip` to the root of your SD card
1. Vuelve a insertar tu tarjeta SD en tu consola
1. Enciende tu consola

#### Section II - safecerthax DNS
1. Launch the System Settings application
1. Navigate to `Internet Settings` -> `Connection Settings`
1. Click on your network connection slot and navigate to `Change Settings` -> `Next Page (right arrow)` -> `DNS`
1. Set "Auto-Obtain DNS" to "No", then click `Detailed Setup`
1. Set both the Primary DNS and Secondary DNS to `054.038.133.070`
1. Click OK, then click Save
1. When prompted, click "Test" to perform the connection test
	+ The test should succeed
1. Apaga tu consola

#### Section III - safecerthax
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
1. Presiona "OK" para aceptar la actualización
  + No hay actualización. Esto es parte del exploit
1. Presiona sobre "Acepto" para aceptar los términos y condiciones
  + The update should fail and an error message should appear
  + If the update does not fail, it is possible that your ISP is rerouting DNS changes. Try another internet connection, or follow an alternate method, like [Installing boot9strap (Browser)](installing-boot9strap-(browser)).
1. Press "OK" to close the error message
1. Si el exploit ha funcionado, habrás iniciado SafeB9SInstaller
  + If the console freezes or crashes, force power off the console, then retry this section
 
#### Section IV - Installing boot9strap

1. Espera a que todos los controles de seguridad se completen
1. Cuando se solicite, introduce la combinación de botones mostrada para instalar boot9strap
1. Una vez se haya completado, presiona (A) para reiniciar tu consola

#### Section V - Configuring Luma3DS

1. Tu consola debería haber reiniciado en el menú de configuración de Luma3DS
  + Si la pantalla se queda en negro, [sigue la guía de solución de problemas](troubleshooting#black-screen-on-sysnand-boot-after-installing-boot9strap)
1. Utiliza el botón (A) y las flechas direccionales para activar lo siguiente:
  + **"Show NAND or user string in System Settings"**
1. Presiona (Start) para guardar y reiniciar
  
#### Section VI - Restoring default DNS
1. Launch the System Settings application
1. Navigate to `Internet Settings` -> `Connection Settings`
1. Click on your network connection slot and navigate to `Change Settings` -> `Next Page (right arrow)` -> `DNS`
1. Set "Auto-Obtain DNS" to "Yes"
1. Click OK, then click Save
1. When prompted, click "Test" to perform the connection test
	+ The test should succeed
1. Apaga tu consola

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### Continúa en [Finalizar instalación](finalizing-setup)
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