According to figures released by Gartner on Thursday, Microsoft's mobile operating system had 11 percent of the global smartphone market in Q3 2008. A year later, it had 7.9 percent of the market, while the iPhone's share had risen from 12.9 percent to 17.1 percent, and RIM's share had risen from 16 percent to 20.8 percent.

Symbian's market share fell from 49.7 percent to 44.6 percent over the same period — a 10 percent drop.

The open-source Android operating system did not have any market share in Q3 2008, as it had only recently been introduced. In Q3 2009, however, it had a market share of 3.9 percent of the smartphone market. Palm's WebOS had 1.1 percent, and other Linux-based mobile operating systems had 4.7 percent.