Tutorial: How to region change an original, Japanese N3DS' emuNAND to USA/EUR
WARNING: I am not responsible for any damage to your system. Follow each step carefully and don't cut corners.
Also, this may remove all installed applications on your emuNAND.
Requirments​

• A Japanese non XL/LL N3DS (obviously) running <= 9.2 sysNAND.
• A computer.
• An emuNAND running 9.2 - 10.4 with CFW that disables signature checks.
• A donor SecureInfo_A from any 3DS (Old, new, xl/ll, non xl/ll) running the target region (US/EUR) on your SD card. *Note online games and such may not work properly on the donor console and/or your console if the donor has connected to the internet using the same SecureInfo_A
• A CIA version of a CIA installer installed on your emuNAND.
• 3DSNUS on your computer.
• A way of running .3dsx preferably menuhax on your sysNAND.
• Decrypt9WIP by d0k3 installed as a 3dsx.
• The update/downgrade CIAs for your same emuNAND firmware and for your target region from that ISO site. Hint: It's the ones everyone has been using to downgrade their sysNAND. Extract the updates folder to the root of your SD card.

Step A: Backing up your emuNAND if something goes wrong​

1. Start up Decrypt9WIP through the Homebrew Launcher and select "EmuNAND Options".​
2. Select "EmuNAND Backup" and choose the name for it to be stored under.​
3. Grab a snack and wait about 10 - 20 minutes.​
4. After the backup process, power off your console.​
5. You have completed step A.​

Step B: Installing the update/downgrade CIAs for your target region​

1. Boot into your emuNAND with a CFW. Preferably Cakes.​
2. Start your CIA installer that features batch folder install. Preferably FBI.​
3. Go to the updates folder you extracted and install all the CIAs. If you are using FBI, press X while in the updates folder.​
4. Do some exercise and burn off that snack you just ate for 5 - 10 minutes. ​
5. If all CIAs installed successfully, power off your system.​
6. You have completed step B.​

Step C: Injecting a target region SecureInfo_A into your emuNAND​

1. Power on your system.​
2. Start the Homebrew Launcher with your preferred exploit.​
3. Start Decrypt9WIP​
4. Go to "EmuNAND Options" -> "File Inject..." -> "Inject SecureInfo_A"​
5. Follow the safety check displayed on your screen.​
6. Choose the file name of the donor SecureInfo_A and press A.​
7. It should finish in about 5 seconds.​
8. If the Inject succeeded, power off your console.​
9. You have finished step C.​

Step D: Cleaning up​

1. Boot your emuNAND.​
2. Wait for 2 - 3 minutes until it boots. Note: You may be missing some system applications, don't panic as this is normal. Go to Step E (after finishing this step) if they are.​
3. After it finishes booting, open System Settings and format your system.
4. After the format finishes, reboot into emuNAND and finish the setup.
5. Note: If your CIA manager is gone, don't panic. You can follow this https://gbatemp.net/threads/release-inject-any-app-into-health-safety-o3ds-n3ds-cfw-only.402236/ guide to inject your CIA manager into your health and safety application.
6. Now, on your computer download a csv title list from yls8.mtheall.com/reports.php for your previous fw region/version and for your new fw region/version.
7. Use this https://gbatemp.net/threads/release...is-safe-to-delete-after-region-change.383796/ awesome tool by cearp and get all the safe title IDs you can delete.
8. After getting a list of title ids, something similar to " ['0004001000020000', '0004001000020100', '0004001000020400', '0004001000020900', '0004001000020A00', '000400100002BF00', '0004001020020300', '0004001020020D00', '0004001020023100', '000400102002C800', '000400102002C900', '000400102002CA00', '000400102002CB00', '0004003000008202', '0004003000008302', '0004003000008402', '0004003000008602', '0004003000008702', '0004003000008D02', '0004003000008E02', '0004003000009502', '000400300000BC02', '000400300000C002', '000400300000C102', '000400300000C302', '000400300000C402', '000400300000C602', '0004003020008802', '000400302000C003', '0004009B00012202', '000400DB00017202', '000400DB20016202'] " use your CIA manager and go through the installed CIAs on your NAND. Whenever you get to a title ID to delete, uninstall it. FBI works well for this.
9. Use the home button and close your CIA manager. Note: If you get "An error has occurred" just restart your emuNAND. This has happened to me.
10. You have finished step D.

Optional: Step E: Restoring lost system titles

1. Go to yls8.mtheall.com/reports.php and find the title IDs for the lost titles make sure they are for your new region. Some titles may not be under New3DS reports, in this case, find the latest Old3DS report.​
2. Download the missing titles with 3DSNUS and pack them as CIAs.​
3. Move the CIAs to your SD card and install to emuNAND with your CIA manager.​
4. They may not show at first, restart your emuNAND.​
5. You have finished step E.​

Optional: Step F: Something F'ed up and now you need to restore your emuNAND.

1. Power off your device and boot to sysNAND.​
2. Use your preferred exploit to enter the Homebrew Launcher and run Decrypt9WIP.​
3. Go to "EmuNAND Options" -> "EmuNAND Restore".​
4. Follow the safety check shown.​
5. Select the same file name you used in Step A.​
6. Grab a snack and wait 10 - 20 minutes.​
7. When finished, exit and reboot.​
8. All changes you've made in this tutorial have been reverted.​
9. You have finished step F.​

 

[Nirmonculus]

Would it be okay if I just use the donor Secureinfo_A from that iso site?

 

[Akira]

Would it be okay if I just use the donor Secureinfo_A from that iso site?

It's probably fine, but It wont matter since you still cant access eshop once region changed.

 

[Nirmonculus]

It's probably fine, but It wont matter since you still cant access eshop once region changed.

I'm aware that eshop won't be accessible and maybe the sd card trick will work for that but I'm ok not accessing eshop. I don't really go in it even on my current console.

I'm just wondering if there is a potential risk (other than the eshop being inaccessible) to be had using a Secureinfo out in the open like, not being able to go online or a ban risk.
Like this particular snippet,
[*Note online games and such may not work properly on the donor console and/or your console if the donor has connected to the internet using the same SecureInfo_A]
So I guess this would mean that if the donor and the recipient of the secureinfo were to go online at the same time, there would be trouble.

I guess I wasn't so specific in my previous post. XD

 

[Akira]

As far as I know, @Pecrow confirmed to me via PM that he can play online games after region change(JP to US). I sent him a pm just now asking where did he get his SecureInfo_A from. But pretty much, I think he got it from that iso site(im just assuming here). Let's just wait for a more "definite" answer.

BTW, I also want to try region change. But haven't decided yet when since I want to know If I can do region change after doing arm9loaderhax.

 

[Pecrow]

As far as I know, @Pecrow confirmed to me via PM that he can play online games after region change(JP to US). I sent him a pm just now asking where did he get his SecureInfo_A from. But pretty much, I think he got it from that iso site(im just assuming here). Let's just wait for a more "definite" answer.

BTW, I also want to try region change. But haven't decided yet when since I want to know If I can do region change after doing arm9loaderhax.

I got mine from a cheap 2ds that I traded, but the one on that Iso site appears to work, for the purpose of emunand region change, will not work for eshop,

 

[angrybanana5000]

So if I have an O3DS, can I use that Secure info A, inject it into a Japanese N3DS lite and then use that same N3ds online?

 

[demonguard]

Could you do this process on a A9LH sysnand cfw? I assume it would work pretty much the same.

 

[Akira]

Could you do this process on a A9LH sysnand cfw? I assume it would work pretty much the same.

Yes

 

[ll0rT]

Is it safe to go online on donor 3DS at the same time with region changed 3DS? Will ninty detect same serials connecting two times and ban me?

 

[Akira]

Is it safe to go online on donor 3DS at the same time with region changed 3DS? Will ninty detect same serials connecting two times and ban me?

As long as you use a .CIA format of a game, your fine. The only downside of region changing is you won't have access to eshop.

BUT

I just recently saw this, and I just had an orgarsm:

http://gbatemp.net/threads/yifanlu-releases-3ds-cfw-cosmo3ds.420912/

 

[DarkFlare69]

Is it safe to go online on donor 3DS at the same time with region changed 3DS? Will ninty detect same serials connecting two times and ban me?

no, but you can change the serial just to be safe.

 

[Queno138]

Not sure if it's mentioned anywhere here,
but you can region change with your own secureinfoA

Just change the byte value for your region to the desired region.

 

[Nirmonculus]

Not sure if it's mentioned anywhere here,
but you can region change with your own secureinfoA

Just change the byte value for your region to the desired region.

Interesting. How do you change the value of a SecureInfo_A?

 

[Pecrow]

Not sure if it's mentioned anywhere here,
but you can region change with your own secureinfoA

Just change the byte value for your region to the desired region.

Yeah I came here for this too, You have my undivided attention, please elaborate.

BTW, if we need a Secureinfo_A file that has never been online, to be able to access the eshop after the region change, could we just modify the serial at the end of thefile?or change something else? To make a new clean secureAfile?

 

[Queno138]

Interesting. How do you change the value of a SecureInfo_A?

Yeah I came here for this too, You have my undivided attention, please elaborate.

BTW, if we need a Secureinfo_A file that has never been online, to be able to access the eshop after the region change, could we just modify the serial at the end of thefile?or change something else? To make a new clean secureAfile?

Use decrypt9 to dump the Secureinfo of your Emunand.

To change the region, use HxD and change it as per here: https://www.3dbrew.org/wiki/Nandrw/sys/SecureInfo_A
(at offset 0x100, from 00 - 06, choose the appropriate region)

This only provides you with a region changed secureinfo.
you still have to install the appropriate files for the region for it to work.

Also, only inject back into Emunand, it'll only work there.
I think this only work with CFWs with signatures-checking patched.

This is how I managed to change to a Korean system (as KOR secureinfo is nowhere to be found)

EDIT:

Not sure, I've never tried to use a region-changed system for eshop.

 

[Akira]

Yeah I came here for this too, You have my undivided attention, please elaborate.

BTW, if we need a Secureinfo_A file that has never been online, to be able to access the eshop after the region change, could we just modify the serial at the end of thefile?or change something else? To make a new clean secureAfile?

Ive done this. Changed my own secureinfo to US, still can't access eshop.

 

[Pecrow]

Im trying to inject a clean nnidsave.bin to register a new one on my emunand but decrypt9 does not allow me to select the option, it skips it when I try to scroll to it.... ugh..

--edit--

i got it with decript9WIP

 

[Pecrow]

Ok, set a new NNID, secureinfo_a file in the root of the SD card, booted back into reinand, jumped into the eshop. same error...

 

[koziakauzu]

My emunand is still linked to my nnid, is it safe to format the emunand through system menu? Will it format my sd card?

(I don't care about my emunand, I don't need to back it up and I'm using sysnand a9lh for my current region games, that's where all my games and saves are, so I don't want to lose them trying to format the emunand)

 

[Nirmonculus]

Hm, eshop access still not possible then. XD Which is fine, I don't really go there.
I've been looking around, Plailect has a guide for region changing on sysnand a9lh. No access to eshop either.