Egham, UK, May 19, 2011 View All Press Releases Gartner Says 428 Million Mobile Communication Devices Sold Worldwide in First Quarter 2011, a 19 Percent Increase Year-on-Year Apple, Samsung and HTC Reported Strongest Results in an Increasingly Smartphone-Dominated Market Worldwide mobile communication device sales to end users totaled 427.8 million units in the first quarter of 2011, an increase o