I have a Samsung Galaxy S3 and the phone was in my pocket. I forgot that my credit card was also in the same pocket and just out of nowhere my phone played the notification sound, so I pulled it out of my pocket and there were no notifications; no new email or SMS, nothing.

So then I pulled the card out and swiped it near the back of my phone, and then the sound played again. I did it like 20 times and it always happens. Why does my phone play the notification sound when I wave the credit card at the back of it?


Does your credit card have an NFC chip? The phone can read and write NFC data. It is probably activating Android Beam or S Beam.

  • Ohh, I forgot all about NFC. I didn't think we even had that in Australia yet. @mcrumly, does thing mean that we can find something online on our phones, and buy it with our cards by waving the card near our phone? Apr 21 '14 at 5:19
  • 2
    Probably not. But you can buy things with your phone at a store that accepts NFC payments. I don't know what is available in Australia, but in the US I can pay using Google Wallet, Isis, and a few others.
    – mcrumley
    Apr 21 '14 at 5:25

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