There's Android Pay, Apple Pay, and now Walmart Pay — a-new mobile payment system from the US retailer that lets customers buy their shopping using the Walmart app. Users can secure this process with a four-digit passcode or Apple ID,-reports-Mashable, and although QR codes can be more hassle than touch-to-pay NFC systems, Walmart argues that its method works for a wider range of devices. All customers need on their smartphone is the Walmart app and a working camera.



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