Download the gw_testrom.3ds from their website and put It on the SD card. Then run the diagnostics test in the GW menu and tell us the results.Tried switching micro sd cards didn't work .
Tried with my friend's gateway with my sd and it works , so my gateway is probably broken right ? any solutions ?
DidTry another micro SD card
Arightyour only hope is to rip off the sticker and take it apart. Perhaps a solder joint cracked or a pin is bent. Either could probably be fixed with a bit of finesse.