Here’s how it could be done: To begin with, head over to Settings > Apps > See all apps. Then tap on the overflow icon situated at the top right and select Show System. After that, scroll to the NFC service app and tap on Clear .Ensure that wireless communication is enabled on your system. Press the POWER button on the NFC Reader. The power LED will turn on blue. If the battery power is getting low the LED will turn red. Place the Nintendo 3DS NFC Reader/Writer and the handheld system on a flat level .