Mobile ad network, InMobi has released its Mobile Insights Report – Asia Pacific Regional Summary for the second quarter of 2011. The mobile ad market in Asia Pacific on InMobi’s network grew by 17% to over 55 billion ad impressions quarterly.

In terms of impressions, Smartphone overtook that of advanced phones. In fact they grew twice as fast. This is a global trend.

Nokia OS still has a 27% market share which makes it still the top operating system although it lost 2.2 percentage points this quarter. Android and iPhone continue to capture a considerable share, now representing 18.1 % of all InMobi impressions in the Asia Pacific region.

The Apple iPhone remains the single most popular device in Asia pacific with 7.6 share.

Atul Satija, VP & Managing Director – Asia Pacific for InMobi, said, “The significant growth in smartphone impressions points towards a rich media environment that enables greater innovation and increased consumer interaction.”