An Uber app is seen on an iPhone in Beverly Hills, California, December 19, 2013.

Lucy Nicholson—Reuters

Lucy Nicholson—Reuters

An Uber app is seen on an iPhone in Beverly Hills, California, December 19, 2013.

Your browser, Internet Explorer 8 or below, is out of date. It has known security flaws and may not display all features of this and other websites.

Learn how to update your browser