I'd been rather concerned that the Canalys figures throughout 2005 had been somehow 'missing' all the Windows Mobile smartphones branded by network operators. But according to Bill Gates himself, total worldwide sales of Microsoft-powered smartphones in 2005 were only about 3.6 million. This compares to Nokia's combined S60 and Series 80 sales of around 23 million. Symbian OS thus outselling Windows Mobile by 5 and a half to one. Now that's what you call a market lead.