Google on Thursday unveiled its pay-with-a-phone system for Android devices, ramping up its challenge to Apple in mobile payments. Android Pay, unveiled at the Google Developers conference in San Francisco, brings together mobile carriers, payment networks, banks and retailers to allow smartphone users to use their handsets instead of payment cards. Google engineering vice president Dave Bruke said Android Pay would work in more than 700,000 US retail outlets that accept contactless payments.



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