Bought a brand new 3DS XL with firmware 4.1 (give or take a 0.0.1), bought the 3DS Gateway, and I am still very happy with it - its a wonderful piece of hardware with a solid team behind it and it worked very well with every rom I threw at it. By using Gateway Firmware 1.0 first I could even upgrade to 3DS firmware 4.5 with it (cause why not?). Anyway every now and then the system would crash (few and far apart) and the black screen would appear with the 'restart the console' prompt, I thought nothing of it since everything was fine after restarting (despite having to sacrifice a minute to reapply the patches etc). But then came the day the crashes came while trying to start the game, then by just being in the menu and now finally I can only turn the console on for a few seconds before the crash occurs. I returned the 3DS to the store and since I missed warranty it gets sent off to nintendo for repair, a long month later I finally get the thing back - apparently the issue was in the memory or something and they couldn't fix it so they just gave me a new one and transferred what they could (but according to the store manager that wasn't much) . I boot the new console up and BAM same problem as before, it immediately crashes a few seconds in, somehow they transferred the problem (and didn't bloody test it). Long story shirt, I'm now minged off and have to wait another month for them to send it back and try again. I'm just wondering if you guys have any insight on why this happened, clearly the issue was on the software side not hardware, could the Gateway have caused this? I find it probable since its the only thing I used the 3DS for while I had it (minus a legit copy of Super Mario 3D land :3 ). tl;dr 3DS XL crashes on boot after using Gateway, got a new 3DS XL from Nintendo with the problem transferred out of the box ninja edit: Out of the box going through the 3DS setup of the new 3DS XL there was no crashes, it was only after I reached the home screen that it crashed (in the two seconds I saw that all my folder arrangements had be transferred... perhaps what ever fiddling Gateway does got transferred because Nintendo didn't know to look for it?