62% of smartphones in use in the US are either Android (Google) or iOS (Apple). The sum a year ago was 37%. There are about 20 million iPhone users and 27 million Android users in the US today. A year ago there were 12 and 6 million respectively. RIM’s (BlackBerry) US user base peaked at 22 million in Sept 2010. It is now 19 million and dropping.
During April 475,000 people abandoned their Blackberries.
Android and iOS gained 3 million users in April. One million switched from other smartphones and 2 million switched from non-smartphones. http://www.asymco.com/2011/06/06/peak-rim/