hi i got acekard 2i in mail with 3ds firmware wich lower firmware lower then 1.8.6 wont work on cart for dslight so i took shot and lower to 1.4 1 for dsi and it worked dam bomb you can down grade carts 100 percent works let nommort no about the downgrade.....if you flash to 3ds your cart when put in dslight only 1.8.6 firmware will work on cart.some games need lower firmware to play them enjoy