How To Dump OTP.bin If You Lose It After Installing A9LH
While the OTP isn't really needed once A9LH is installed, if the file is lost, than here is a guide to get it back if you really want it.
1- Back everything on your SD Card to a folder on your PC. Then launch Hourglass9 and make a NAND backup. Then rename it to sysNAND-A9LHAX.bin as well as sysNAND-A9LHAX.bin.sha and put it somewhere on your PC.
2- Follow these steps https://3ds.guide/9.2.0-ctrtransfer , then restore your original Health and Safety through Decrypt9. (Should be named "hs.app")
3- Download SafeA9LHInstaller and copy all the files to the root of your SD Card, even replacing arm9loaderhax.bin.
4- When your system boots up, press the button to uninstall Arm9LoaderHax.
5- Then when your system boots up, follow https://3ds.guide/ and get to the point where you downgrade to 2.1. Then, download OTPHelper https://github.com/d0k3/OTPHelper/releases and extract all the files and folders to the root of your SD Card. Now, follow these steps.
And that's it! Also, credit to Plailect for parts of Step 5 and 6.
1- Back everything on your SD Card to a folder on your PC. Then launch Hourglass9 and make a NAND backup. Then rename it to sysNAND-A9LHAX.bin as well as sysNAND-A9LHAX.bin.sha and put it somewhere on your PC.
2- Follow these steps https://3ds.guide/9.2.0-ctrtransfer , then restore your original Health and Safety through Decrypt9. (Should be named "hs.app")
3- Download SafeA9LHInstaller and copy all the files to the root of your SD Card, even replacing arm9loaderhax.bin.
4- When your system boots up, press the button to uninstall Arm9LoaderHax.
5- Then when your system boots up, follow https://3ds.guide/ and get to the point where you downgrade to 2.1. Then, download OTPHelper https://github.com/d0k3/OTPHelper/releases and extract all the files and folders to the root of your SD Card. Now, follow these steps.
- Go to http://dukesrg.github.io/2xrsa.html?arm11.bin on your 3ds
- OTPHelper will launch, then select the "Dump otp.bin (0x108)" option
- Go back to the main menu, then Select the "Dump otp.bin (0x100)" option
- Press Select on the main menu to eject your SD card
- Put your SD card in your computer, then copy over otp0x108.bin and otp.bin to a safe folder on your computer.
- Ensure that otp.bin is 256 bytes and otp0x108.bin is 264 bytes
- Backup otp.bin and otp0x108.bin to multiple locations (such as online file storage)
- Reinsert your SD card into your 3DS then press B to return to the main menu
- Go to "NAND Backup & Restore"
- Restore SysNAND from sysNAND_A9LHAX.bin
- Cross your fingers
- Reboot!
And that's it! Also, credit to Plailect for parts of Step 5 and 6.