As Apple expands tap-and-pay system and Google and Samsung launch apps,worlds largest retailer testing system as section of an overall mobile strategy The mobile payment wars are heating up.
Walmart Stores, the worlds largest retailer, and said it is testing its own mobile payment system that will allow shoppers to pay with any major credit or debit card or its own store gift card through its app at the cash register.
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Source: theguardian.com