Note that, on some versions of Luma3DS, the Luma3DS chainloader menu is only displayed if there is more than one payload detected. If there is only one payload detected, holding (Start) on boot will directly launch GodMode9.
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To use the [magnet](https://en.wikipedia.org/wiki/Magnet_URI_scheme) links on this page, you will need a torrent client like [Deluge](http://dev.deluge-torrent.org/wiki/Download)
Before proceeding, ensure you have read all of the notices and warnings on [Installing boot9strap (DSiWare)](installing-boot9strap-(dsiware))
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#### What ye need
* Two 3DS systems
+ **The source 3DS**: the 3DS running some kind of custom firmware (such as boot9strap or arm9loaderhax) *on the latest version*
+ **The target 3DS**: the 3DS on stock firmware *on 11.4.0*
* Purchase (or already own) a compatible DSiWare game from the eShop on **the source 3DS**
+ A pirated copy of the game will **not** work
+ For a list of compatible games, see the [Installing boot9strap (DSiWare Game Injection List)](installing-boot9strap-(dsiware-game-injection-list)) page
* The sudokuhax injection `.zip` corresponding to your region
Use a [save manager](https://github.com/J-D-K/JKSM/releases/latest) to backup any saves you care about on *the target 3DS* (it will be formatted!)
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1. Power off **the source 3DS**
1. Insert **the source 3DS**'s SD card into your computer
1. Copy `GodMode9.firm` (or `GodMode9.bin` for arm9loaderhax users) from the GodMode9 `.zip` to the `/luma/payloads` folder on **the source 3DS**'s SD card
1. Copy the `.app` from DSiWare injection `.zip` to the root of **the source 3DS**'s SD card
1. Copy `savedata` folder from DSiWare injection `.zip` to the root of **the source 3DS**'s SD card
1. Reinsert **the source 3DS**'s SD card
1. Boot **the source 3DS** while holding (Start) to launch the Luma3DS chainloader menu
1. Launch GodMode9 by pressing (A)
1. Press (Home) to bring up the action menu
1. Select "More..."
1. Select "Backup NAND"
1. Press (A) to continue
1. Hold (R) and press (B) at the same time to eject your SD card
1. Put **the target 3DS**'s SD card into your computer
1. **Backup every file on both 3DS's SD cards to two separate folders on your computer (keep track of which is which)!**
1. Reinsert each SD card back into their corresponding 3DS
1. Press (Start) on **the source 3DS** to reboot
##### Section II - Injecting the game and save
1. Boot **the source 3DS** while holding (Start) to launch the Luma3DS chainloader menu
1. Launch GodMode9 by pressing (A)
1. Navigate to `SDCARD`
1. Press (Y) on the DSiWare injection `.app` to copy it
1. Press (B) to go back to the main menu
1. Navigate to `SYSNAND TWLN` -> `title` -> `00030004` -> `(8 Character ID)`
+ The 8 Character ID will be the one from the [Installing boot9strap (DSiWare Game Injection List)](installing-boot9strap-(dsiware-game-injection-list)) page
1. Navigate to `content`
1. Press (A) on the `.app` file in the folder
1. Select "Inject data @offset"
1. Press (A) to select the offset `00000000`
1. Press (A) to unlock SysNAND writing, then input the key combo given
1. Press (B) to go back to the main menu
1. Navigate to `SYSNAND TWLN` -> `title` -> `00030004` -> `(8 Character ID)`
+ The 8 Character ID will be the one from the [Installing boot9strap (DSiWare Game Injection List)](installing-boot9strap-(dsiware-game-injection-list)) page
1. Press (Y) on the file(s) in the `savedata` folder to copy them
+ If there is a `savedata` folder inside of the `savedata` folder, it is not by mistake. You should copy the second `savedata` folder, not the files inside of that.
1. Press (B) to go back to the main menu
1. Navigate to `FAT IMAGE`
1. Use the (X) button to delete everything inside of `FAT IMAGE`
1. Press (Y) to paste a copy of **the contents of** the `savedata` folder to `FAT IMAGE`
1. Select "Copy path(s)"
1. Press (A) to unlock image writing, then input the key combo given
1. Press (Start) to reboot
1. Launch your DSiWare game on **the source 3DS**
1. Tap the screen or press any button to start the game and test if the save is functional
+ If your game has an error about `boot.nds`, **then the exploit has been successful**
+ If your game has an error about corrupted or inaccessible save data, confirm that you copied **the contents of** the `savedata` folder and not the `savedata` folder itself
+ If your game behaves normally and does not give you an error about `boot.nds`, then you should stop and figure out what went wrong
+ If you get a black screen, [follow this troubleshooting guide](troubleshooting#twl_broken)
+ If the game is missing from **the target 3DS** or has an error about corrupted or inaccessible save data, [follow this troubleshooting guide](troubleshooting#ts_dsiware)
##### Section III - System Transfer
1. If **the target 3DS** has a Nintendo Network ID on it, you must format the device using System Settings:
+ Go to the last page of "Other Settings" and select "Format System Memory", then follow all instructions
1. Read the following:
+ Your CFW 3DS = the source 3DS = "Source System"
+ Your Stock 3DS = the target 3DS = "Target System"
+ **Move DSiWare titles if prompted!**
+ Do **NOT** delete the source system's SD card contents if prompted
+ Make sure neither device's battery dies during the transfer
+ 2DS/Old 3DS (source) to New 3DS (target) only - if asked which method you wish to use to transfer the SD card data:
+ **Do NOT** choose the "Low-Capacity microSD Card Transfer" or minimal option (option 2), it will only transfer tickets and likely will not transfer the DSiWare save.
+ Fast Method: If you have the ability to move the data from the SD card (source) to the microSD card (target), when prompted use the "PC-Based Transfer" option (option 3).
+ Slowest Method: If you don't have the ability to move the data on a PC use the **full** "Wireless Transfer" option (option 1).
1. Go to [this link](http://en-americas-support.nintendo.com/app/answers/detail/a_id/227/) and follow Nintendo's official instructions for System Transferring from one system to another while keeping in mind what you just read
##### Section IV - Restoring the source 3DS
1. On **the source 3DS**, complete initial setup
1. Do one of the following
+ Do the rest of the sections and then the full guide on **the target 3DS**, then wait one week, then System Transfer from **the target 3DS** back to **the source 3DS** *(remember you cannot transfer back from a New 3DS to an Old 3DS)*
+ Call Nintendo and tell them you no longer have access to the device that your NNID is linked to (which is **the target 3DS** in this case), and would like it linked to a different device (which is **the source 3DS** in this case)
+ You can also just [remove the NNID](https://3ds.guide/troubleshooting#rm_nnid) from **the source 3DS** if you'd prefer it remain on **the target 3DS**
1. Reboot **the source 3DS** while holding (Start) to launch the Luma3DS chainloader menu
1. Launch GodMode9 by pressing (A)
1. Navigate to `[0:] SDCARD`
1. Press (A) on your NAND `.bin` to select it, then select "NAND image options...", then select "Restore SysNAND (safe)"
1. Press (A) to unlock SysNAND overwriting, then input the key combo given
+ This will not overwrite your boot9strap installation
1. Input the key combo given to unlock SysNAND (lvl1) writing
+ This process will take some time
1. Once it has completed, press (A) to continue
1. Press (Start) to reboot **the source 3DS**
##### Section V - Backing up the target 3DS's FIRM
1. Copy `boot.nds` to the root of **the target 3DS**'s SD card
1. Create a folder named `boot9strap` on the root of **the target 3DS**'s SD card
1. Copy the 11.4.0 `.firm` corresponding to **the target 3DS** to the `boot9strap` folder on the root of **the target 3DS**'s SD card
1. Copy `boot9strap.firm` from the boot9strap `.zip` to the `/boot9strap/` folder on your SD card
1. Launch b9sTool by starting your DSiWare game on **the target 3DS**
+ If the game does not launch b9sTool, [follow this troubleshooting guide](troubleshooting#ts_dsiware)
1. Select "Dump F0F1" to backup **the target 3DS**'s FIRM
1. Make note of the FIRM backup's location
1. Exit b9sTool
+ You may have to force power off by holding the power button
1. Put your SD card in your computer, then copy `F0F1_N3DS.bin` or `F0F1_O3DS.bin` (depending on your device) to a safe location; make backups in multiple locations; this backup will save you from a brick if anything goes wrong
##### Section VI - Flashing the target 3DS's FIRM
**Do NOT use b9sTool on a device that already has arm9loaderhax installed or you will BRICK!**
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1. Launch b9sTool by starting your DSiWare game on **the target 3DS**
1. Select "Install boot9strap" and confirm
1. Exit b9sTool, then power off your device
+ You may have to force power off by holding the power button
1. Your device will boot into boot9strap, then shutdown automatically because it does not yet have a payload to launch
