A mobile phone is displayed with Visa payment platform t at the Mobile World Congress in Barcelona, Spain, Thursday, Feb. 17, 2011. Phones that can be used to pay for things, much like credit cards or gas-station key fobs, have been a dream of the wireless industry for years. This year, it looks set to become a dream a reality as both phone makers and wireless carriers get on board. The Mobile World Congress is held from Feb. 14-17. (AP Photo/Manu Fernandez)
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