Guide_3DS/_pages/vi_VN/installing-boot9strap-(2xrsa).txt

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title: "Installing boot9strap (2xrsa)"
---

#### What you need

* The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/latest)
* The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/latest) *(standard boot9strap; not the `devkit` file, not the `ntr` file)*
* The latest release of [Luma3DS](https://github.com/AuroraWright/Luma3DS/releases/latest) *(the `.7z` file)*
* The Homebrew [Starter Kit](http://smealum.github.io/ninjhax2/starter.zip)

#### Instructions

##### Section I - Prep Work

1. Power off your device
1. Insert your SD card into your computer
1. Copy `boot.firm` from the Luma3DS `.7z` to the root of your SD card
1. Copy _the contents of_ `starter.zip` to the root of your SD card
1. Create a folder named `boot9strap` on the root of your SD card
1. Copy `boot9strap.firm` and `boot9strap.firm.sha` from the boot9strap `.zip` to the `/boot9strap/` folder on your SD card
1. Copy `arm9.bin` and `arm11.bin` from the SafeB9SInstaller `.zip` to the root of your SD card

    ![]({{ base_path }}/images/screenshots/boot9strap-2xrsa-file-layout.png)
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1. Reinsert your SD card into your device
1. Power on your device

##### Section II - Launching SafeB9SInstaller

1. Launch the browser and go to the following URL on your device
  + `http://2xrsa.3ds.guide`
  + If you are on a New 3DS, New 2DS, or Old 2DS and Wireless Communication is off, you can re-enable the wireless by removing the battery and unplugging the charger for several seconds then booting back up
  + If you get the error "This service is not available in your region", use the System Settings to set your device's country to match the NAND region you installed with 2.1.0 CTRTransfer
  + If you forgot to disable parental controls before CTRTransfering or otherwise cannot access wireless settings, note that the device will autoconnect to any network named `attwifi` with no password
  + If you get another error, [follow this troubleshooting guide](troubleshooting#ts_browser)
1. If the exploit was successful, you will have booted into SafeB9SInstaller

##### Section III - Installing boot9strap

1. Wait for all safety checks to complete
1. When prompted, input the key combo given to install boot9strap
1. Once it has completed, press (A) to reboot your device

##### Section IV - Configuring Luma3DS

1. Your device should have rebooted into the Luma3DS configuration menu
  + If you get a black screen, [follow this troubleshooting guide](troubleshooting#ts_sys_b9s)
1. Use the (A) button and the D-Pad to turn on the following:    
  + **"Show NAND or user string in System Settings"**
1. Press (Start) to save and reboot
  + If you get an error, just continue the next page

___

Note that *New 3DS* users who ended up on 2.1.0 after a CTRTransfer *must* [restore their NAND backup](godmode9-usage#nand_restore) before going to the [Finalizing Setup](finalizing-setup) page.
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Continue to [Finalizing Setup](finalizing-setup)
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