Software requirement.
iOS or Android. All of the phones with those operating systems have QR scanners. Technically you'd be right as the 1 and only hardware requirement is a camera, but what phone with those operating systems doesn't have a camera?
Actually I find it hard to believe that Windows or Blackberry phones can't do it so really ANY smart phone can
Just broke my personal record for number of consecutive days without dying!
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no they don't
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