TIPTON Ind. —A new mobile-marketing tool in use in several central Indiana restaurants is changing the way operators promote specials to customers. The tool, called Tetherball, is a nickel-sized radio-frequency identification, or RFID, tag that sticks to the back of a mobile phone and simplifies the redemption of offers sent by text message. Operators using the tool say redemption is both trackable in real time and fraud-proof. Once ...
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