Good evening everyone, I have the exact same issue. My app will read an NFC chip that I attached to the back of the phone, but it will never read it a second time... Has anyone fixed this?? My app is an advertising app where you attach an NFC chip to a sticker (advertisement) and the phone will verify that the sticker is presents by once or twice a month verifying that the chip is within range of the NFC radio in the Iphone... My developer who wrote the initial app, could not figure it our. Any assistance would be greatly appreicated!