If you downgrade to 2.1.0 on a 2DS or New 3DS and left Wireless Communication off, you can re-enable the wireless by removing the battery and unplugging the charger for several seconds then booting back up.
**2.1.0 ctrtransfer를 진행하기 전에 청소년 보호 기능을 비활성화시키세요. If you do not know the password, see [this](https://mkey.salthax.org/) site. If you cannot disable parental controls because the linked NNID is for a child under 13, you can instead set all parental control options to "do not restrict".**
이번 섹션에서는 [CTRNAND](https://www.3dbrew.org/wiki/Flash_Filesystem#CTR_partition) 파티션에 2.1.0 버전을 플래싱한 후, 버전의 취약점을 이용하여 기기 고유의 [OTP](https://www.3dbrew.org/wiki/OTP_Registers)를 추출합니다. 이 OTP 파일은 arm9loaderhax 설치에 필요하며, 다른 기기에서는 사용이 **불가능** 합니다.
이는 2.1.0 버전을 담은 [ctrtransfer 이미지](https://www.reddit.com/r/3dshacks/comments/4zhe4a/)를 설치한 후, 기기 고유의 정보를 담은 파일들 (`moveable.sed`와 `SecureInfo_A` 등)을 복사하고 타이틀 데이터베이스를 수정하는 것으로 이루어집니다.
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