Ericsson's President & CEO Hans Vestberg shows a 5G chip as he jokes with Ralph de la Vega of AT&T during...
Ericsson's President & CEO Hans Vestberg (L) shows a 5G chip as he jokes with Ralph de la Vega, Vice Chairman of AT&T Inc and CEO of AT&T Business Solutions and AT&T International, during the Mobile World Congress in Barcelona, Spain February 22, 2016. REUTERS/Albert Gea TPX IMAGES OF THE DAY