So when I ordered my gateway, Dwtechz was the only site that claimed to have it in stock. Long story short, the shipping was terrible and took 1 month to get here. So the first gateway would cycle through some diagnostic colors (it has been a while I forgot which, teal or such) and then it would go to solid blue even if there was no microsd card inserted. Dwtechs let me exchange. A bunch of time passed by and I got the exchanged card. They sent me a card that appears to be very used and the stickers are damaged from the use. And the connectors on the edge are tarnished as well as a bunch of grubby filth along the sides of it and in the opening of the microsd card slot. So this one was a little more promising, although there was the above mentioned. I put in a microsd card with Mario Tennis on it and went into gateway mode. Mario Tennis appeared so to my delight, I started the game and oops "The Game Card Was Removed" error appears. I have fiddled with this thing for 3 hours and can't get it to even run a game. I tried Formula 1 2011 also it doesn't work. These games show up on the 3DS menu and the icon has sound and whatnot but the game doesn't work. This is strange too because when I do diagnostic mode on this card, it goes from red to green right away. It does not even attempt to test the sd card. I tried the diagnostics rom file too, nothing. So all in all... this card cost a lot, doesn't work. I exchanged once. It doesn't look like I'm getting anywhere with gateway cards. My 3DS is from a non smoking home and has nothing at all wrong with it, besides that it isn't updated beyond 4.5 for obvious reasons. I'm not asking for help in this thread because I know there is no solution to this. And yes I have tried wedging paper between the SD card and the slot to get better contact. It doesn't help. Just letting people know.. the first card I received new from this vendor, the second used. Both didn't work. Don't buy from here I guess. The gateway I have is broken and won't ever be fixed. Received as is DOA. edit: btw I have tried all the methods. I have a stack of how many different sd cards here 10 microsd cards from vendors sandisk, patriot, Kingston, and Samsung. I have sdformatter tool, win32diskimager, and internal SD card reader, USB sd card reader, I have a USB microsd card reader also. But not asking for help, again, since I looked everywhere online. Nobody can fix this. Btw if you want to buy a flash cart for 3DS at this point I would strongly suggest against buying a gateway 3DS. The R4i Gold Deluxe 3DS looks better to me so far and no I am not advertising for them.