Walmart today said Walmart Pay, its mobile payment service, is now available at all of its stores across the country -- more than 4,600 locations. The service, first announced last year, competes with Android Pay, Apple Pay, and Samsung Pay. It works with both Android and iOS smartphones. Rather than rely on NFC or MST for tap-and-go transactions, Walmart Pay involves the Walmart mobile app. Customers can add most any credit or debit card to the Walmart app for purchases. At checkout, users need to open the app and launch the camera. Using the camera, customers scan a code displayed at the register. This activates the transaction. The associate scans and bags the items and the final amount due is taken from the credit/debit card associated with the app. Customers will receive an electronic receipt that is saved in the app. Apple Pay, Samsung Pay, and Android Pay all allow users to tap their phones on retail payment terminals to make purchases. Walmart has resisted supporting these competitive mobile payment services in favor of its own. The company says customers rate the experience highly and are using it increasingly.


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