The point-of-sale terminal at the CVS drugstore in Palo Alto, California, can accept payments through a quick tap from a smartphone. The clerk isn’t sure how it works, though he knows it does because “a few kids” have used it. But one shopper tries it by taking out his Android phone and clicking on Google’s “wallet” app intended to allow instant payment and taps the terminal. Nothing happens. Then he tries PayPal’s payment app. Nothing. Out comes the leather wallet.
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