According to a recent report by Gartner Inc., sales of smartphones were up 74% year-on-year, accounting for 25% of overall sales of mobile devices in Q2, 2011, up from 17% in Q2, 2010.

Having led smartphone sales over the last five years, Nokia is set to lose its top spot as the largest seller of smartphone in Q3, 2011, according to Gartner. These are in terms of smartphone sales to end users. In terms of shipments to vendors, Nokia has already lost the top spot to Apple (and the 2nd place Samsung), according to research firms Strategy Analytics and IDC Research.

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