Hey. I notice some people were trying to inject FBI app into Health & Safety app but it fails. Try this method instead! 1. Download FBI as .3dsx and .cia , put 3dsx into 3ds folder and put CIA anywhere in SD card, 2. Turn on 3DS and hold SELECT, you'll be on Luma3DS config, 3. Toggle the last option about patching arm9/svc access (aka gaining Kernel exploit) and START to save, 4. Launch Homebrew Launcher with SoundHax, 5. Go to FBI. If fatal error shows up, follow 3 and try again. 6. Look for FBI.cia and install, 7. Back out to HOME Menu and wait for it... 8. Success! You have installed FBI. 9. Turn off arm9 patching to not cause security risks. You can go back to https://3ds.guide/installing-arm9loaderhax and finish CFW.