According to the latest 3DS News that 3DS/XL firmware has been updated to 3DS V5.0-10, this item firmware update improved the system stability to give our users a better experience,yet,at the same time,it led to some famous card,such as ak2i,r4isdhc 3ds been blocked.
Following is a confirmed working list and let's have a quicker look :
Compatibility list :
r4i gold 3ds from r4ids.cn
It was said that at present,just dstwo and r4i gold 3ds can work on 3DS V5.0-10 , the rest card have been blocked,yet,IMO,there are safe reason to belive that later more and more cards will join the compatibility list,just the matter of time. So,let's sit down and have a cup of tea to see more updated news.
Note : never update your console before updating your card.