HTC CEO Peter Chou (L) hugs AT&T CEO Ralph de la Vega (R) and Facebook co-founder and CEO Mark Zuckerberg following the unveiling of Facebook Home for Android during a press event to unveil a new app smartphones, in Menlo Park, California April 4, 2013. REUTERS/Robert Galbraith (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY TELECOMS)