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This Friday, Nov. 21, 2014, photo taken in Newark, N.J., shows smartphones displaying Uber car availability in New York. Uber is offering car service in 250 cities in 50 countries now, up from 60 cities in 21 countries just a year ago. Uber hasn't released its financial figures to the public, so valuing the company is pure guesswork. (AP Photo/Julio Cortez)