The protocol specifics 3 transport options with this in mind: usb, nfc, and Bluetooth. As others mention, nfc works great for android. Bluetooth is your only o

The protocol specifics 3 transport options with this in mind: usb, nfc, and Bluetooth. As others mention, nfc works great for android. Bluetooth is your only option for iOS, and it’s clunky because you have to deal with pairing.