Ads to your cell phone coming

Your cell phone is a potential gold mine for marketers: It can reveal where you are, whom you call and even what music you like. Considering the phone is usually no more than a few feet away, these are powerful clues for figuring out just the right moment to deliver the right coupon for the store just around the corner. But first marketers will have to wrest the personal profiles from mobile carriers worried that annoyed subscribers might defect to rivals. Carriers are now guarding the data zealously, but many people believe it's only a matter of time, over the next year or two, before marketers can routinely target ads to a potential customer's location and actions.