The worldwide mobile phone market grew 21.7% in the first quarter of 2010, a strong rebound from the market contraction in Q1 2009. Growth was fuelled by increased demand for smartphones, and the global economic recovery. According to the IDC Worldwide Mobile Phone Tracker, vendors shipped 294.9 million units in the first quarter of 2010 compared to 242.4 million units in the first quarter of 2009.