| http://www.w3.org/ns/prov#value | - Three of the four largest mobile phone carriers in the U.S. have formed a joint venture to turn phones into digital wallets, allowing subscribers to pay for groceries and other retail items using their phones, instead of credit cards or other methods.AT&T Mobility, Verizon Wireless and T-Mobile USA, with a combined 220 million U.S. customers, announced Tuesday that they have formed the Isis mobile
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