BARCELONA, SPAIN - FEBRUARY 25:  A visitor checks his mobile phone as he walks past a Samsung stand during the first day of the Mobile World Congress 2013 at the Fira Gran Via complex on February 25, 2013 in Barcelona, Spain. The annual Mobile World Congress hosts some of the world's largest communication companies, with many unveiling their latest phones and gadgets. The show runs from February 25 - February 28.  (Photo by David Ramos/Getty Images)