What? I don't know how NFC works but I do know that I don't generally walk around with WiFi enabled on my phone so some WiFi based thing is not going to work fo

What? I don't know how NFC works but I do know that I don't generally walk around with WiFi enabled on my phone so some WiFi based thing is not going to work for me. And while it seems the adverts for devices with NFC tend to show some sort of file sharing going on, there are other uses that don't involve an actual file share, just a need for authentication (building access, transit, making a payment). Sure a packet of data is a packet of data, but I don't think of it as "sharing" data with the door lock when I badge it.