"Android's share declined slightly sequentially. This was due to strong iPhone sales, driven in particular by the iPhone 4S in mature markets and the weakness of key Android vendors as they struggled to create unique and differentiated devices. Samsung remained the main contributor to Android share gains in the second half of 2011," Gartner added.
In the next quarters, Gartner said it expects the market share of Apple iOS to decrease as the time for end-users to upgrade to the iPhone 4S slows.
Sales from the newly-introduced first Windows Phone smartphones, the Nokia Lumia 710 and 800, were not enough to prevent a fall in Microsoft's smartphone market share.
The data were derived from Gartner's report titled "Market Share: Mobile Devices by Region and Country, 4Q11 and 2011."
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