10.4 HAS BEEN RELEASED, AND IT FIXES DAMN NEAR EVERYTHING. DO NOT UPDATE. YOU GET ONE SHOT AT DOWNGRADING NOW. YOU SOFTBRICK, YOU LOSE.
This OP is very volatile right now. As such, it has been trimmed until we can get a proper one that details everything with 10.4. Read the thread for info, downloads, and news.
>What the fuck is this? English, please.
memchunkhax2 is an exploit used to downgrade 3DS firmware. Most importantly, it can downgrade to 9.0-9.2, which are ideal firmwares that can be further exploited for access to CFW, and thus warez and faster homebrew and emulators via kernel mode. This is possible on any firmware up to and including 10.3. Note that memchunkhax2 requires access to homebrew in order to run.
>How do I get homebrew and prepare for CFW?
First, see http://smealum.github.io/3ds/, unzip the starter kit to your SD card, then find your firmware version below for general instructions. Note that Tubehax is dead on all devices, all firmwares. Ignore it.
<9.0:
>You'll want to update to 9.0-9.2, preferably 9.2. There are ways to update straight to 9.X with CFW, or you can find a game card that has a 9.0-9.2 update on-cart and use that. Lurk GBAtemp for details.
9.0-9.2:
>You have no use for memchunkhax2. Use browserhax, install a CFW of your choice.
9.3-9.8:
>Use browserhax, optionally install themehax as a more permanent solution.
O3DS 9.9-10.3:
>If you have the update nag that prevents you from using the web browser, and have ABSOLUTELY no other options such as Ninjhax, OoT3Dhax (which can be installed with a Powersaves dongle!), you are fucked. If you somehow don't have the nag, then turn off your wireless immediately, use the Tubehax DNS to block updates, scan a QR code Post too long. Click here to view the full text.