EDIT: THIS HAS POTENTIAL TO BRICK YOUR 3DS. I WOULDN'T RECCOMEND YOU TO USE THIS GUIDE, AS IT IS VERY UNSAFE, AS STATED IN THE ORIGINAL GUIDE THAT I COPY-PASTED. Follow this guide instead. But if you for some reason still want to use this guide, do it, but don't blame me if you brick. This guide is copy-pasted from here Guide: This guide begins assuming you are already on 9.2. If not, follow Plailect's guide. Step 1. Take your SD card out of your 3DS and put it in your computer Step 2. Download the a9lh folder here and place the contents on the root of your SD card. This contains the payloads and firms necessary for installing A9LH. Step 3. Download the latest release of safea9lhinstaller and place the contents of the 7zip file on the root of your SD card Step 4. Turn on your 3DS with the SD card reinserted and boot homebrew launcher on your 9.2 sysNAND Step 5. Open safea9lhinstaller Step 6. Press select and you'll have arm9loaderhax!