currently there is no card can play 3ds games on V7.1 3ds firmware. all of them can only work on V4.1 to V4.5 3ds. for now, you can only play ds games on your 3ds with a flashcart, recommend you get the r4i gold 3ds card to play ds games, check the info here http://www.dsflashcart.com/r4i-gold-3ds...-3ds-p-248.html
far as i knew, all 3ds game supported card can just emulator v7.1 games on N3DS V4.5-4.1,but cant run 3ds games on N3DS V7.1. If you want buy a 3ds game card, you can choose this one : http://www.modchipwarehouse.com/mtcard-...s-rom-p-15.html ,it can support multi 3ds rom to allow us play lots of 3ds games at one time.
are there any cards currently which work with v7.1.0 which play 3ds games in 3d.
sorry for having little knowledge with the 3ds.
thanks in advance
Don't worry about the lack of knowledge, asking questions is how we all started to learn. Unfortunately the 3DS system that can support cards like the Gateway 3DS from http://www.gateway-3ds.org all require the systems to be running an older version of the systems software, from v4.1 to v4.5 - anything above or below that, simply will not work and the gateway 3ds card won't be able to load.
If you have a 7.1.0 version 3ds or 3ds xl, your best bet would be a 3DS compatible flash card that lets you play ahundreds, if not thousands of homebrew games and applications as well as ds and dsi games. card like http://www.r43ds.org/products/R4i-Gold-3DS-Flash-Card.html will work just fine on the 7.1.0 and are a valid alternative until cards like the gateway are able to work on higher versions of the 3DS system software.
