Tue, 03/08/2011 – 07:28 byMobile ad network InMobi today released its “Mobile Insights Report: Global Edition January 2011.” The report effectively covers all major regions of the globe and there’s a trove of data from each continent. I’ll focus only on North America and global data. The company reports that smartphones now represent 36% of global ad requests on the InMobil publisher network, up from 24% — just three months ago. Most of that growth has been driven by Android. But most ad requests (84%) are coming from mobile Web vs. apps (16%). Unlike in the US where Android is now the top smartphone platform, Nokia and Apple outstrip Android on a global basis. However Android’s growth is much greater than that of the iPhone and Nokia is declining by almost as much as Android is growing. In North America operating system share appears like this to InMobi:

• Android: 37%
• iPhone: 24%
• RIM: 11%

InMobi explains that Android has gained 21 share points in just three months to become the largest OS in North America. These numbers are not an absolute reflection of market share but what InMobi sees in terms of handsets and operating systems making ad requests. In terms of individual handsets, the iPhone continues to dominate on InMobi’s network globally and in North America. Global device share:  North American device share:  It’s clear from the totality of all the available data that Android’s gains are coming through the sheer number of devices in the market. Windows isn’t on the radar for InMobi in North America. And RIM appears to be getting overwhelmed by the Android onslaught.