So yeah, I have a r4 dual core new, I bought it like 3 years ago or something and I didn't really never use it that much. Now we have 2 3ds and 1 gateway card, so I thought my brother and I could play ds games, one person with the gateway and the other with the r4. One 3ds is on frmware 4.4 and the other one 4.2, so it should theoretically work with the r4, but no. With the 4.4 fmw. 3ds it says the classic error, please turn off the console, etc. and with the 4.2 fmw. 3ds it stays on a white screen... I don't even know if the r4 is fake or something but I remember it working some time ago. I managed to find the ds_menu and the rpg folder for that r4 (it's from 2012 so in the official page they don't support it anymore, just like apple and his iphones, that every now and then they release a new one with no new shit and they forget the old ones...), but till now it doesn't seem to work. Have anybody any idea how it could work