---
title: "A9LH to B9S"
---

{% include toc title="Table of Contents" %}

### Required Reading

'Tis page be fer users wit' arm9loaderhax who wanna update their devices to boot9strap.

All future releases 'o Luma3DS gunna only be made in th' `.firm` format, which gunna only be workin' on systems wit' boot9strap 'n sighax. 'Tis means that if ye want to continue to be receivin' th' latest updates 'o Luma3DS, ye should use 'tis page to be updatin' ye installation.

To use the [magnet](https://wikipedia.org/wiki/Magnet_URI_scheme) links on this page, you will need a torrent client like [Deluge](http://dev.deluge-torrent.org/wiki/Download).

To extract the `.7z` files linked on this page, you will need a file archiver like [7-Zip](http://www.7-zip.org/) or [The Unarchiver](https://theunarchiver.com/).

{% capture notice-1 %}
While we believe custom firmware is relatively safe at this time, it is important to note that it will never be "ban free".

You should avoid the following actions:
1. Piracy
1. Cheating online
1. Suspicious behaviour on eShop (for example, credit card chargebacks)

We believe SpotPass and StreetPass are also safe for use at this time.

{% endcapture %}

<div class="notice--danger">{{ notice-1 | markdownify }}</div>

### What You Need

Note that th' followin' required file, named `secret_sector.bin`, be th' same one that was found in th' various `data_input.zip` file versions. If ye already have that file on ye hard disk somewhere, ye can be usin' that one instead 'o downloadin' th' one below.
{: .notice--info}

Note that, only on New 3DS, `secret_sector.bin` is needed to revert the arm9loaderhax exploit, which is why it is not needed for the installation of boot9strap on a stock console. If ye do not have a New 3DS, ye gunna not be needin' `secret_sector.bin`.
{: .notice--info}

* <i class="fa fa-magnet" aria-hidden="true" title="'Tis be a magnet link. Use a torrent client to download the file."></i> - **New 3DS Users Only:** [secret_sector.bin](magnet:?xt=urn:btih:15a3c97acf17d67af98ae8657cc66820cc58f655&dn=secret_sector.bin&tr=udp%3A%2F%2F9.rarbg.to%3A2710%2Fannounce&tr=udp%3A%2F%2Fbt.xxx-tracker.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fexodus.desync.com%3A6969%2Fannounce&tr=udp%3A%2F%2Fmgtracker.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fopen.demonii.si%3A1337%2Fannounce&tr=udp%3A%2F%2Fpublic.popcorn-tracker.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fthetracker.org%3A80%2Fannounce&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.cypherpunks.ru%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.ds.is%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.internetwarriors.net%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.mg64.net%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.open-internet.nl%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.port443.xyz%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.qt.is%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.torrent.eu.org%3A451%2Fannounce&tr=udp%3A%2F%2Ftracker.vanitycore.co%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker-2.msm8916.com%3A6969%2Fannounce)
* The latest release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/latest) 
* The v7.0.5 release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/tag/v7.0.5) *(the `.7z` file)*
* 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)*

### Instructions

#### Section I - Prep Work

Fer all steps in 'tis section, overwrite any existin' files on ye SD card.
{: .notice--info}

1. Power off ye device
1. Insert ye SD card into ye computer
1. Copy `boot.firm` and `boot.3dsx` from the latest version Luma3DS `.zip` to the root of your SD card
1. Copy `arm9loaderhax.bin` from the v7.0.5 Luma3DS `.7z` to the root of your SD card
1. Delete any existin' `.bin` payloads in th' `/luma/payloads/` folder on ye SD card, as they gunna be incompatible wit' boot9strap Luma3DS versions
1. Copy `SafeB9SInstaller.bin` from the SafeB9SInstaller `.zip` to the `/luma/payloads/` folder on your SD card
1. Create a folder named `boot9strap` on th' root 'o ye SD card
1. Copy `boot9strap.firm` 'n `boot9strap.firm.sha` from th' boot9strap `.zip` to th' `/boot9strap/` folder on ye SD card
1. **New 3DS Users Only:** Copy `secret_sector.bin` to th' `/boot9strap/` folder on ye SD card

    ![]({{ "/images/screenshots/a9lh-to-b9s-file-layout.png" | absolute_url }})
    {: .notice--info}

1. Reinsert ye SD card into ye device

#### Section II - Installing boot9strap

1. Boot your device while holding (Start) to launch SafeB9SInstaller
  + If you see the luma configuration screen instead of SafeB9SInstaller, simply press (Start), then shutdown your 3DS and try again
  + If this gives you an error, try either using a new SD card, or formatting your current SD card (backup existing files first)
1. Wait fer all safety checks to be completed
  + If ye get an "OTP Crypto Fail" error, download <i class="fa fa-magnet" aria-hidden="true" title="'Tis be a magnet link. Use a torrent client to download the file."></i> - [aeskeydb.bin](magnet:?xt=urn:btih:d25dab06a7e127922d70ddaa4fe896709dc99a1e&dn=aeskeydb.bin&tr=udp%3A%2F%2F9.rarbg.to%3A2710%2Fannounce&tr=udp%3A%2F%2Fbt.xxx-tracker.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fexodus.desync.com%3A6969%2Fannounce&tr=udp%3A%2F%2Fmgtracker.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fopen.demonii.si%3A1337%2Fannounce&tr=udp%3A%2F%2Fpublic.popcorn-tracker.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fthetracker.org%3A80%2Fannounce&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.cypherpunks.ru%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.ds.is%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.internetwarriors.net%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.mg64.net%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.open-internet.nl%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.port443.xyz%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.qt.is%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.torrent.eu.org%3A451%2Fannounce&tr=udp%3A%2F%2Ftracker.vanitycore.co%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker-2.msm8916.com%3A6969%2Fannounce), then put it in the `/boot9strap/` folder on your SD card and try again
1. When prompted, input th' key combo given to be installin' boot9strap
1. Once it has completed, press (A) to be rebootin' ye device.
  + If your device shuts down on boot, ensure that you have copied `boot.firm` from the Luma3DS `.zip` to the root of your SD card

#### Section III - Configuring Luma3DS

1. In the Luma3DS configuration menu, 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 'n reboot

___

### Continue to [Finalizing Setup](finalizing-setup)
{: .notice--primary}