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<p><ahref="https://github.com/zoogie/MSET9">MSET9</a> is an exploit for the System Settings application developed by <ahref="https://github.com/zoogie">zoogie</a>. It exploits a flaw where the ID1 (the second 32-character folder name inside of the Nintendo 3DS folder, inside of the ID0) can be <em>any</em> name as long as it is 32 characters. Performing a specific sequence of actions results in the console executing the instructions that are encoded into the ID1 folder name, which can be used to grant full control over the 3DS.</p>
<pclass="notice--warning">This page requires an Android phone/tablet or a Chromebook. If you have a computer running Windows, macOS, or Linux, follow <ahref="installing-boot9strap-(mset9-cli)">Installing boot9strap (MSET9 CLI)</a> instead. If you do not have access to any of these devices, you will need to use an <ahref="alternate-exploits">alternate exploit</a>.</p>
<li>If you wish, you can sideload these applications instead</li>
</ul>
</li>
<li>The latest release of <ahref="https://github.com/zoogie/MSET9/releases/latest">MSET9</a> (the Release <codeclass="language-plaintext highlighter-rouge">.zip</code> file)</li>
</ul>
<h3id="instructions">Instructions</h3>
<h4id="section-i---prep-work">Section I - Prep Work</h4>
<p>In this section, you will prepare the SD card data necessary for the MSET9 exploit to trigger.</p>
<ol>
<li>Power on your console <strong>with your SD card inserted</strong></li>
<li>Open Mii Maker</li>
<li>Wait for your console to reach the “Welcome to Mii Maker” screen, then exit Mii Maker
<ul>
<li>You may see <ahref="/images/screenshots/mset9/mii-extdata.png">this screen</a>, which indicates the necessary data has been created</li>
<li>If you just reach the normal Mii Maker screen, exit Mii Maker and continue to the next step</li>
</ul>
</li>
<li>Power off your console</li>
<li>Insert your SD card into your phone/tablet/computer</li>
<li>Copy everything from the Release <codeclass="language-plaintext highlighter-rouge">.zip</code> to the root of your SD card, overwriting any existing files:
<ul>
<li>Open ZArchiver</li>
<li>If prompted, <ahref="/images/screenshots/mset9/zarchiver-allow.png">allow ZArchiver to access files on your SD card</a></li>
<li>Navigate to where the downloaded MSET9 Release <codeclass="language-plaintext highlighter-rouge">.zip</code> is located (<ahref="/images/screenshots/mset9/zarchiver-zip-location.png">likely in the Downloads folder</a>)</li>
<li>Select the Release <codeclass="language-plaintext highlighter-rouge">.zip</code>, then select “Extract…” (<ahref="/images/screenshots/mset9/zarchiver-extract-1.png">image</a>)</li>
<li>Navigate to your SD card, then tap the blue ‘down arrow’ icon to extract the files to the root of your SD card (<ahref="/images/screenshots/mset9/zarchiver-extract-2.png">image</a>)</li>
<li>Run the <ahref="/images/screenshots/mset9/mset9-setup-android.png">MSET9 Installer application</a></li>
<li>Tap on <codeclass="language-plaintext highlighter-rouge">Select "Nintendo 3DS" Folder</code>, then navigate to your <codeclass="language-plaintext highlighter-rouge">Nintendo 3DS</code> folder on your SD card (<ahref="/images/screenshots/mset9/select-mset9-folder-1.png">image</a>)</li>
<li>Once inside the <codeclass="language-plaintext highlighter-rouge">Nintendo 3DS</code> folder, tap on “Use this folder”, then “Allow” if asked (<ahref="/images/screenshots/mset9/select-mset9-folder-2.png">image</a>)</li>
<li>If “Setup MSET9” is <ahref="/images/screenshots/mset9/setup-mset9-highlighted.png">highlighted</a>, MSET9 is ready to be injected. Close the MSET9 Installer for now
<ul>
<li>If “Check Again” is highlighted, there is a problem that you need to resolve before you can use MSET9. Refer to the <ahref="troubleshooting#installing-boot9strap-mset9">troubleshooting</a></li>
</ul>
</li>
<li>Reinsert your SD card into your console</li>
<li>Power on your console</li>
</ol>
<h4id="section-ii---mset9">Section II - MSET9</h4>
<p>In this section, you will trigger MSET9 to launch SafeB9SInstaller (the custom firmware installer).</p>
<pclass="notice--danger">These instructions must be followed <strong>EXACTLY</strong>, so double-check EVERYTHING you are doing to avoid errors!</p>
<ol>
<li><strong><ahref="/images/screenshots/mset9/hover-settings.png">Hover over</a></strong> the System Settings icon using the D-Pad (do not select it yet)</li>
<li><strong>Do not press any buttons or touch the screen</strong> - ensure that you see the Mii Maker icon</li>
<li><strong>With the console STILL ON, and without pressing any buttons or touching the screen</strong>, remove your SD card from your console
<ul>
<li>The menu will refresh and say that no SD card is inserted, which is expected</li>
</ul>
</li>
<li>Insert your SD card into your phone/tablet/computer</li>
<li>Open the MSET9 Installer application</li>
<li>Tap “Setup MSET9”</li>
<li>Tap on the photo corresponding to your console model, then on the button corresponding to your current firmware version
<ul>
<li>If the injection was successful, all buttons should become grayed out except for “Remove MSET9”</li>
</ul>
</li>
<li>Reinsert your SD card into your console <strong>without pressing any buttons or touching the screen</strong></li>
<li>If the exploit was successful, you will have booted into SafeB9SInstaller
<ul>
<li>If you get a red screen or the console gets stuck on a loading screen, follow the <ahref="troubleshooting#installing-boot9strap-mset9">troubleshooting guide</a></li>
</ul>
</li>
</ol>
<h4id="section-iii---installing-boot9strap">Section III - Installing boot9strap</h4>
<p>In this section, you will install custom firmware onto your console.</p>
<ol>
<li>When prompted, input the key combo given on the top screen to install boot9strap
<ul>
<li>If a step on the lower screen has red-colored text, and you are not prompted to input a key combo, <ahref="troubleshooting#issues-with-safeb9sinstaller">follow this troubleshooting guide</a></li>
</ul>
</li>
<li>Once it is complete, press (A) to reboot your console</li>
<li>Your console should have booted into the Luma3DS configuration menu
<ul>
<li>Luma3DS configuration menu are settings for the Luma3DS custom firmware. Many of these settings may be useful for customization or debugging</li>
<li>For the purpose of this guide, <strong>leave these options on the default settings</strong> (do not check or uncheck anything)</li>
<li>If your console shuts down when you try to power it on, ensure that you have copied <codeclass="language-plaintext highlighter-rouge">boot.firm</code> from the Luma3DS <codeclass="language-plaintext highlighter-rouge">.zip</code> to the root of your SD card</li>
</ul>
</li>
<li>Press (Start) to save and reboot</li>
</ol>
<h4id="section-iv---removing-mset9">Section IV - Removing MSET9</h4>
<p>In this section, you will remove MSET9 to prevent further issues. (This will not remove the custom firmware that you just installed.)</p>
<pclass="notice--danger">Do NOT skip this section! If you skip it, applications may crash unexpectedly and you will encounter errors on the next page!</p>
<ol>
<li>Power off your console</li>
<li>Insert your SD card into your phone/tablet/computer</li>
<li>Open the MSET9 Installer application</li>
<li>Tap “Remove MSET9”</li>
<li>Close the MSET9 Installer application</li>
</ol>
<p>At this point, your console will boot to Luma3DS by default.</p>
<ul>
<li>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.</li>
<li>On the next page, you will install useful homebrew applications to complete your setup.</li>
</ul>
<hr/>
<pclass="notice--danger">Did you follow Section IV (Removing MSET9)? That section is MANDATORY!</p>
<h3class="notice--primary"id="continue-to-finalizing-setup">Continue to <ahref="finalizing-setup">Finalizing Setup</a></h3>
