Jerriann Sullivan

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At first, Starbucks customers will need to show the merchant a bar code on their phones. But when Starbucks uses Square’s full GPS technology, the customer’s phone will automatically notify the store that the customer has entered, and the customer’s name and photo will pop up on the cashier’s screen. The customer will give the merchant his or her name, Starbucks will match the photo and the payment will be complete. Even though Square’s app has been well reviewed, it has not caught on with shoppers, which has been Square’s biggest challenge as it tries to expand. That is in large part because of the limited number of merchants that accept payments that way. Most of Square’s users are small businesses, like farm stands or cafes that also use Square’s credit card reader.

Starbucks and Square to Team Up - NYTimes.com