CEOs (L-R): Steve Ballmer of Microsoft, Stephen Elop of Nokia and Ralph de la Vega of AT&T Mobility display their Nokia Lumia 900 smartphones at the Consumer Electronics Show opening in Las Vegas January 9, 2012. The Lumia 900 is the first 4G LTE Windows Phone platform device and will be offered on AT&T's network. REUTERS/Rick Wilking (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY TELECOMS)