This page is for instructions on how to install boot9strap to a *stock* 3DS or 2DS. If you already have arm9loaderhax installed and are looking to update to boot9strap, follow [A9LH to B9S](a9lh-to-b9s).
Different device models, versions, and regions will require different steps to achieve the end goal of boot9strap Custom Firmware. 下面的一系列页面将会帮助你针对你的设备找到适合的开始方案。
{: .notice--info}
如果你已经破解过你的3DS，并安装了基于EmuNAND的自制系统，请在SysNAND上进行本教程的所有操作。 Your data will be transfered from EmuNAND to your new B9S install at the end.
{: .notice--info}
Note that screenshots in this guide can be enlarged to show more context by clicking on them.
{: .notice--info}
Before starting, Windows users should enable the option to show file extensions using [File Extensions (Windows)](file-extensions-(windows))!
Note that the new [Installing boot9strap (Hardmod)](installing-boot9strap-(hardmod)) method works on *all devices, regions, and versions*! This includes CHN and TWN region devices that were previously unhackable!
{: .notice--success}
{% capture notice-1 %}
There have been reports of a wave of bans being handed out to CFW users by Nintendo. To protect yourself, please do the following steps before starting this guide:
1. Go to System Settings, then "Internet Settings", then "SpotPass", then "Sending of System Information"
1. Disable the "Sending of System Information" option
1. Exit the System Settings
1. Go to your Friend's List (the Face Icon in the top row of your Home Menu)
+ If you receive an error and are kicked out of the menu, the Friend's List setting is already disabled
1. Go to the Friend's List settings, then "Friend Notification Settings", then "Show friends what you're playing"
1. Disable the "Show friends what you're playing" option
