How to update your 'old' 3DS/2DS from below 9.0.0 to 9.2.0 (thx to
@samiam144 )
1. Complete the Preparation section (0, see readme.txt).
2. Open the internet browser on your 3DS/2DS and type
http://lavanoid.no-ip.org/?open . Once the screens start to change, hold L until the rxTools menu shows up.
3. In rxTools menu, go to the right until you see "ADVANCED OPTIONS" on the bottom screen, press (A), select "INSTALL FBI" and select "sysNAND" by pressing X. Press B, take note of what it says on screen, then repeat this but this time press Y after selecting sysNAND again.
4. Go to
(link removed by author due to the rules of GBATemp, check my twitter) and download the 9.2.0 firmware ZIP archive that fits your 3DS system region (E for Europe and Australia, U for America and J for Japan), as well as the fbi_inject.tmd and fbi_inject.app files that fit your region and your TMD version (both should have been shown on screen previously). If you don't know your TMD version, you will need to download all of them and try them one by one.
5. Once downloaded, open the 9.2.0 firmware ZIP archive and find the "updates" folder; place it on your SD card.
Copy the fbi_inject.tmd and fbi_inject.app files to the root of your SD card.
6. Turn on your 3DS/2DS.
7. Open the internet browser of your 3DS/2DS and type
http://lavanoid.no-ip.org/?open .
8. In rxTools menu, go to the right until you see "ADVANCED OPTIONS" on the bottom screen, press (A), select "INSTALL FBI", follow the instructions on screen and then select "DEVMODE".
9. Open the Health & Safety app to open FBI.
10. Select "CIAs", then "sysUpdater.cia".
11. Wait for the installation to complete, then press [HOME].
12. Open sysUpdater and follow the instructions on screen.
I will add this to the readme.txt ASAP.