David Meyer of ZDNet UK:

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.

That means that while Apple’s market share increased by about 30%, Windows Mobile market share dropped by roughly the same amount. They’re not exactly on track for their goal of 40% global market share by 2012.