Schumer: Probe billboards using phone data to track shoppers

NEW YORK - An outdoor advertising company says its use of mobile phone data to learn about potential consumers is based on anonymous information.Clear Channel Outdoor Americas spokesman Jason King said in a statement Sunday its RADAR program used for billboard advertising has existed for years.U.S. Senator Charles Schumer is calling on the Federal Trade Commission to investigate the technique. The New York Democrat wants to know if the company has employed deceptive trade practices because consu