The global mobile phone market grew 21.7 percent in the first quarter of 2010, a strong rebound over the first quarter of 2009, according to the latest report from IDC. Vendors shipped 294.9 million units in the first quarter of 2010 compared to 242.4 million units a year earlier. Smartphones and a recovering traditional mobile phone category helped the market avoid a repeat of Q109, when the market dove 16.6 percent during the recession.