For years, advertisers have dreamed of taking advantage of technology that discloses a cellphone caller's location to send text messages promoting nearby restaurants and retail stores. But until recently.when wire...For years, advertisers have dreamed of taking advantage of technology that discloses a cellphone caller's location to send text messages promoting nearby restaurants and retail stores. But until recently.when wireless carriers began to upgrade their systems to comply with a federal mandate that they be able to locate anyone dialing 911. few wireless companies had the ability to track the whereabouts of all of their customers.展开更多
文摘For years, advertisers have dreamed of taking advantage of technology that discloses a cellphone caller's location to send text messages promoting nearby restaurants and retail stores. But until recently.when wireless carriers began to upgrade their systems to comply with a federal mandate that they be able to locate anyone dialing 911. few wireless companies had the ability to track the whereabouts of all of their customers.