I am not responsible for any damages that may happen to your 3DS, or provide any support, I am only posting/sharing this information for the public. This could brick your 3DS, so proceed at your own risks. Hardmod is recommended in case anything happens, as this is still fairly new and early stages. Apparently you can downgrade from 10.4/10.5/10.6 without a hardmod. **NOTE: 10.6 requires a pay entry point (OOTHAX or Cubic Ninja)** Memchunkhax3 makes it possible to downgrade NATIVE_FIRM 10.4 to downgrade on BOTH OLD AND NEW 3DS! https://www.reddit.com/r/3dshacks/comments/49ix2n/downgrade_from_105106_is_now_possible_on_o3ds/ Confirmed working by a few users so far. (Reddit) Looks legit.