Thad Rueter

The start-up technology vendor Zenius Solutions Inc. has developed a way to add contactless payment capabilities to smart phones that links the transaction functions to the mobile devices' operating systems.

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Mobile payment systems have become an important financial tool in the developing world, but experts say network operators need to offer more than just person-to-person transfer features to create a compelling business case.

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Total System Services has launched a smart-phone application designed for merchants who do not work in offices and stores, and who accept relatively low volumes of transactions.

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European payments executives are developing at least three networks that would compete with the systems operated by Visa Europe and MasterCard Inc. The Belgian retailer Colruyt Group is planning to begin testing the Payfair debit card at about five stores in October, with a broader rollout expected in 2010.

A cup of coffee here, a hamburger there, a fill-up at the gasoline station on the way to work. Customers are starting to use their contactless payment cards at convenience stores, fast-food restaurants and supermarkets throughout the United States.