Android is the leading smartphone platform in the US, with iOS taking the No 2 spot, a study from research firm comScore suggests.
According to comScore, during the three-month period between January 2011 and April 2011, 74.6m people in the US owned a smartphone, up 13pc from the previous three-month period. More than 234m people in the US used mobile devices in general.
comScore also conducted a study, surveying more than 30,000 US mobile subscribers. It found that in the three-month period ending in April 2011, 26.4pc of participants owned an Android smartphone, a rise of 5.2pc since a similar study over the three-month period ending in January 2011.
The iPhone came second, with a 26pc share, up 1.3pc since January.
RIM came third, with a 25.7pc market share, followed by Microsoft at 8pc. Palm came fifth at 3.2pc.
The top device manufacturer was Samsung, with 24.5pc of survey participants saying they owned a Samsung smartphone. LG came second at 20.9pc, followed by Motorola at 15.6pc.
Apple was fourth at 7pc and RIM came in fifth at 8.6pc.
In terms of mobile content usage, the most-used feature on smartphones was texting, with 68pc of survey participants utilising this function.
Some 39.1pc of participants said they used a browser on their smartphones and 37.8pc used downloaded apps.