The worldwide mobile phone market experienced an expected sequential downturn in shipments following a busy holiday quarter. According to IDC's Worldwide Quarterly Mobile Phone Tracker, vendors shipped a total of 291.6 million units during the first quarter of 2008 (1Q08), down 11.6% from the 330.8 million units shipped during the previous quarter (4Q07) and up 14.3% from the 255.0 million ... continued »