Worldwide sales of smart phones grew 30 percent in the fourth quarter of 2009 to 53 million phones, according to researcher Strategy Analytics.
Nokia led market volumes, ahead of Research in Motion (RIM) and Apple, and shipped 20.8 million smart phones during the fourth quarter - up 38% from one year ago.
I also found an interesting chart from ComScore about U.S. smartphone platform share, or installed base – representing both existing devices and new sales during each period, not just new sales. (Source: businessinsider.com - please check out the comments there - really interesting discussion is going on there)
Sources:c114.netareamobile.de