Nintendo 3DS update their system again, the newest system is v5.0.0-10. Here is the details:
Update Your Nintendo 3DS System Today.
The latest system update brings new features to streamline and enhance your experience. This update is FREE.
Transfer your save data from the packaged version of a game when you purchase the downloadable version of that game. Now, you can start right where you left off when you go digital with your favorite titles.
Games and applications can now be downloaded in the background via Sleep Mode while the Nintendo eShop is running. You can simply close the system cover to activate the Download Later feature and the item will begin to download.
As we know, every time when 3ds or dsi update their system, it will ban a lot of flashcarts. I just tested some of them, good news is there are 3 cards right now is no problem: r4i gold 3ds (r4ids.cn), dstwo, ace3ds plus. These 3 cards work on 3DS newest system v5.0.0-11 perfectly, no need any patch and no need any updating.
Believe that other cards will release their patch soon, but at least, we know not all the flashcart get banned.