Next time you take a taxi in New York City, there may be a new way to pay your fare. Instead of handing over cash, swiping a credit card, or—if you’re one of the few with a capable smartphone—tapping your handset on a near-field communication (NFC) reader, you could be able to settle up by pressing a button on a smartphone app that communicates using sound.
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To read the original article: Why Some Are Turning to Sound for Mobile Payments and More | MIT Technology Review
