Frogminer Guide

What is Frogminer?

Frogminer is a free CFW (Custom Firmware) installation method for the Nintendo 3DS family of systems.

What will I need to do before I begin?

First, a test. Boot 3DS Download Play and launch DS Download Play (bottom button) and wait 10 seconds. If there is a black screen or error screen, DS mode is bricked and you can't use Frogminer, sorry. If DS Download Play boots as expected, great! Go ahead and complete the Steelminer Guide located here. Keep your movable.sed file, you will need it later on in this guide. NOTE: "Steel Diver: Sub Wars" is a FREE download. It's a different game than the 3DS launch title "Steel Diver" that costs money.


Section I: Prepping your SD card

  1. Insert your 3DS SD card into your PC
  2. Download the latest version of Luma3DS here
  3. Download the latest version of b9sTool here
  4. Download the here
  5. Copy boot.firm from the Luma3DS 7z archive to the root of your SD Card
  6. Copy boot.nds from b9sTool archive to the root of your SD Card
  7. Copy Frogtool.3dsx from to the 3ds folder
  8. Copy the private folder from to the root of your SD Card

Section II: Exporting DS download play and injecting JPN Flipnote Studio

  1. Reinsert the SD Card into your 3ds and power it on
  2. Launch Frogtool.3dsx from the Homebrew Launcher
  3. Select "Export clean DS Download Play"
  4. Press START to exit, power off your console and reinsert your SD Card into your PC
  5. Copy 484E4441.bin from the root of your SD Card to somewhere you can remember (for example your desktop)
  6. Open this website and input the info required in the corresponding fields (inputting an email is not required)
    • Upload the 484E4441.bin file to the DSiBin field
    • Upload the movable.sed you used for steelminer to the MovableSed field
  7. Press "Build" and wait a bit for the process to complete
  8. Under build history search your username and click on the latest build
  9. Download 484E4441.bin.patched_username with your username on it. If it is not your username it is not your file
  10. Rename 484E4441.bin.patched_username to 484E4441.bin.patched
  11. Copy 484E4441.bin.patched to the root of your SD Card

Section III: Launching b9sTool

  1. Reinsert the SD Card into the 3DS and power it on
  2. Launch Frogtool.3dsx from the Homebrew Launcher
  3. Select "IMPORT patched DS Download Play"
  4. Tap the touch screen to continue, then select "Boot patched DS Download Play"
  5. Complete the initial setup by choosing the left option when applicable until you reach this screen
  6. Tap the left large box, then tap the box with the SD Card icon
  7. Tap the face, then tap the bottom right button to continue
  8. Tap the frog icon on the bottom left then tap the second button on top with the film icon
  9. Use the touch screen to scroll and highlight frame 3/3 on the film reel
  10. Tap the third box with the letter A, scroll back and tap frame 1/3, then tap the fourth box with the letter A. This should launch b9sTool.
    • If b9sTool launches but an "A9LH dectected! Brick avoided!!" error occurs, please follow Point A from this guide.
  11. Select "Install boot9strap" and confirm with START & SELECT
  12. Wait for it to say "Done!" Exit b9sTool and power off your 3DS
    • You may need to force power off by holding the power button
  13. Power on your 3DS to launch the Luma3DS configuration menu
    • If your 3ds boots normally to the HOME Menu then boot9strap did not install correctly, please follow Point B from this guide.
  14. Use the (A) button and the D-pad to enable "Show Nand or user string in System Settings"
  15. Press START to save and reboot

You can now continue with the Finalizing Setup
Once completed, you can launch Frogminer from Homebrew Launcher and select "RESTORE clean DS Download Play" to restore Download Play functionality


  • zoogie - frogminer, seedminer, b9stool
  • Martin Korth (nocash) - location hints for flipnote privkeys, no$gba, Gbatek docs
  • Shutterbug2000 - ugopwn exploit
  • Fincs and Wintermute - Flipnote Lenny, a revised version of ugopwn
  • zacchi4k and Chromaryu - tool assistance
  • eip - original guide
  • Kuma - revision 2 of eips guide and proofreading
  • Jisagi - implementation and design