Smartphones are not on your side. The Wall Street Journal has the story.

“In the world of mobile, there is no anonymity,” says Michael Becker of the Mobile Marketing Association, an industry trade group. A cellphone is “always with us. It’s always on.”

“The great thing about mobile is you can’t clear a UDID like you can a cookie,” says Meghan O’Holleran of Traffic Marketplace, an Internet ad network that is expanding into mobile apps. “That’s how we track everything.”


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