Guide_3DS/_pages/vi_VN/uninstall-cfw.txt
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2021-12-31 03:01:42 +02:00

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---
title: "Uninstall CFW"
---
{% include toc title="Table of Contents" %}
### Required Reading
This will completely remove CFW from your device, including boot9strap and Luma3DS, for the purpose of restoring the device to stock.
This is never the solution to fix any issues you may be encountering with your CFW installation. A better idea would be to ask (in English) for help at [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp).
{: .notice--danger}
Any unsigned (illegitimate) games will be rendered unusable and should be manually removed before starting this process by using the Data Management section of the System Settings. Use a [save manager](https://github.com/FlagBrew/Checkpoint/releases/latest) to backup any saves for these unsigned (illegitimate) games you care about.
If you have modified critical system software (such as editing the home menu, unbanning your console, region changing, etc.), uninstalling CFW WILL BRICK your device! Ensure that you follow all sections of this page.
{: .notice--danger}
These instructions will only work on devices with a Luma3DS version of 8.0 or higher. If you have an older version of Luma, you must upgrade your setup before following these instructions. Follow [this page](checking-for-cfw) to find your upgrade instructions.
{: .notice--warning}
Note that if you have any payload files other than `GodMode9.firm` in the `/luma/payloads/` folder on your SD card, holding (Start) on boot will display a "chainloader menu" where you will have to use the D-Pad and the (A) button to select "GodMode9" for these instructions.
### What You Need
* The latest release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/latest)
* The latest release of [GodMode9](https://github.com/d0k3/GodMode9/releases/latest)
* The latest release of [DSiWare Uninstaller](https://github.com/MechanicalDragon0687/DSiWare-Uninstaller/releases/latest)
* [safety_test.gm9]({{ base_path }}/gm9_scripts/safety_test.gm9)
### Instructions
#### Section I - Prep Work
1. Power off your device
1. Insert your SD card into your computer
1. Copy `boot.firm` and `boot.3dsx` from the Luma3DS `.zip` to the root of your SD card
1. Copy `GodMode9.firm` from the GodMode9 `.zip` to the `/luma/payloads/` folder on your SD card
1. Copy the `gm9` folder from the GodMode9 `.zip` to the root of your SD card
1. Copy `DSiWareUninstaller.3dsx` to the `/3ds/` folder on your SD card
1. Copy `safety_test.gm9` to the `/gm9/scripts/` folder on your SD card
1. Reinsert your SD card into your device
#### Section II - DS Mode Tests
The purpose of this section is to check whether built-in DS mode applications will continue to work once CFW is uninstalled. If you skip this section, DS mode or its functions may be inaccessible until CFW is reinstalled.
##### DS Connection Settings Test
1. Power on your device
1. Launch the System Settings Application
1. Navigate to `Internet Settings` -> `Nintendo DS Connection Settings`, then click OK
1. You should boot into the Nintendo DS Connection Setup menu
+ If your console displays the Japanese version of Flipnote Studio, a black screen, or an error message, the test has failed
1. Power off your device
##### DS Download Play Test
1. Power on your device
1. Launch the Download Play application (![]({{ "/images/download-play-icon.png" | absolute_url }}){: height="24px" width="24px"})
1. Select "Nintendo DS"
1. If your device loads into a "Download software via DS Download Play" menu, the test was successful
+ If your console displays the Japanese version of Flipnote Studio, a black screen, or an error message, the test has failed
1. Power off your device
If either of these tests has failed, DS mode, DS Download Play, and/or DS Connection Settings may be inaccessible once CFW is uninstalled! You should [fix DS mode](troubleshooting#dsi--ds-functionality-is-broken-or-has-been-replaced-with-flipnote-studio) before continuing.
{: .notice--warning}
#### Section III - Safety Test
The purpose of this section is to verify that the console will boot and that critical system functions, like System Settings and the keyboard, will work once CFW is uninstalled. **If you skip this section, you may BRICK your device!**
1. Press and hold (Start), and while holding (Start), power on your device. This will launch GodMode9
1. If you are prompted to create an essential files backup, press (A) to do so, then press (A) to continue once it has completed
1. If you are prompted to fix the RTC date&time, press (A) to do so, then set the date and time, then press (A) to continue
+ Note that, if you had to fix the RTC date and time, you will have to fix the time in the System Settings as well after following this guide
1. Press (Home) to bring up the action menu
1. Select "Scripts..."
1. Select "safety_test"
1. Read the text on-screen and press (A) to continue
1. You should boot into the regular 3DS Home Menu (any custom theme is irrelevant). If you do, continue these instructions
+ If you do not boot into the regular 3DS home menu (black screen, error screen, etc.), uninstalling CFW **WILL BRICK YOUR DEVICE!**
1. Launch the System Settings Application
+ If the console crashes at this point, the test has failed
1. Select "Other Settings"
1. Select "Profile"
1. Select "User Name"
1. If you are able to enter a new user name, the test was successful
+ If the keyboard does not appear, the screen freezes, or the console crashes, the test has failed
1. Power off your device
If you do NOT boot into the regular 3DS Home Menu, or System Settings / your keyboard is inaccessible, **DO NOT continue with these instructions**! Join [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp) and ask (in English) for someone there to assist you.
{: .notice--danger}
#### Section IV - NAND Backup
1. Press and hold (Start), and while holding (Start), power on your device. This will launch GodMode9
1. Press (Home) to bring up the action menu
1. Select "Scripts..."
1. Select "GM9Megascript"
1. Select "Backup Options"
1. Select "SysNAND Backup"
1. Press (A) to confirm
+ This process will take some time
+ If you get an error, ensure you have at least 1.3GB of free space on your SD card
1. Press (B) to return to the main menu
1. Select “Exit”
1. Press (Home) to bring up the action menu
1. Select “Poweroff system” to power off your device
#### Section V - Removing illegitimate content
This section will remove illegitimate content, like homebrew and dumped cartridges. If you have save data that you care about, back it up with a save manager before continuing!
{: .notice--warning}
1. Power on your device
1. Open the System Settings application
1. Navigate to Data Management > Nintendo 3DS > Software
1. In this list of software, delete any non-Nintendo content you installed while using CFW
+ This includes common system software such as FBI, Anemone3DS, Luma Updater, Homebrew Launcher, Checkpoint, and others, along with any games and titles that you did *not* install from the eShop
1. Navigate to Data Management > DSiWare
1. In this list of software, delete any non-Nintendo content you installed while using CFW
+ This includes software such as TWiLightMenu++, along with any games and titles that you did *not* install from the eShop
+ Failure to remove all CFW software from both the 3DS and DSiWare sections before uninstalling CFW may prevent or disable access to the Data Management menu after uninstalling CFW
1. Exit the System Settings application
1. Launch the Download Play application (![]({{ "/images/download-play-icon.png" | absolute_url }}){: height="24px" width="24px"})
1. Wait until you see the two buttons
1. Press (Left Shoulder) + (D-Pad Down) + (Select) at the same time to open the Rosalina menu
1. Select "Miscellaneous options"
1. Select "Switch the hb. title to the current app."
1. Press (B) to continue
1. Press (B) to return to the Rosalina main menu
1. Press (B) to exit the Rosalina menu
1. Press (Home), then close Download Play
1. Launch the Download Play application
1. Your device should load the Homebrew Launcher
1. Launch DSiWare Uninstaller from the list of homebrew
1. Follow the prompts and allow the program to uninstall
1. Once the process has succeeded, exit the Homebrew Launcher and power off your device
#### Section VI - System Format
This section will ensure that all illegitimate tickets are removed, allowing eShop to work normally. This will remove all content from the 3DS and log you out of your NNID. Keep in mind that your console's encryption key will be shuffled, meaning that any old data will be rendered inaccessible, even if you have a backup of your SD contents.
1. Power on your device
1. Open the System Settings application
1. Navigate to Other Settings -> Next Page (until the final page) -> Format System Memory
1. Follow the prompts to format your 3DS
#### Section VII - Running Uninstall Script
This is your final opportunity to verify that all safety steps above have been followed! Please ensure that you have followed all sections on this page, **especially** `Section III - Safety Test`, before continuing.
{: .notice--warning}
1. Press and hold (Start), and while holding (Start), power on your device. This will launch GodMode9
1. Press (Home) to bring up the action menu
1. Select "Scripts..."
1. Select "GM9Megascript"
1. Select "Hax Options"
1. Select "Un-install Hax"
1. When prompted, press (A) to proceed
1. Press (A) to unlock SysNAND (lvl3) writing, then input the key combo given
1. Press (A) to continue
1. Press (B) to return to the main menu
1. Select "Exit"
1. Press (A) to relock write permissions if prompted
1. Press (Start) to reboot your device
___
All custom firmware has been removed from your device.
{: .notice--success}
You can now remove any extra files and folders from the root of your SD card that are *not* the `Nintendo 3DS`, `DCIM` or `private` folders.
{: .notice--info}