And the newer Pay With Square app lets a customer enter a store, make a purchase and pay for it without swiping anything: The customer simply states his name the vendor's iPad automatically identifies any nearby smartphones running the app and then displays the customer's photo as confirmation before it processes linked credit card data.

WSJ: Simplicity and Order for All | Innovator of the Year 2012 Technology

Both the receiver and the M-Pesa agent then receive a confirmation for withdrawal, which instructs the agent to give the customer cash.

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