Apple might have just tipped its iPhone OS 4.0, but Android has jumped to nine percent of the U.S. smartphone market, according to ComScore. Meanwhile, Nielsen says U.S. smartphone sales will eclipse feature-phone sales by 2011, and ABI Research predicts that over 800 million Android apps will be downloaded this year, making it the fastest-growing OS in app downloads.

ABI Research is projecting that in 2009 Linux will represent 32 percent of netbook sales, far higher than the seven percent figure claimed by Microsoft, says a report. ABI also estimates that Linux will overtake Windows on netbooks by 2013, largely due to sales in less-developed countries, says the story.

The Linux Foundation has published an update to last year's study on Linux kernel development. The updated study reports that for each kernel release there has been a 10 percent increase in the number of contributing developers, resulting in a 42 percent increase in patch acceptance.

Linux will power about 31 percent of all smartphones sold in 2012, and by then will have shipped in 331 million devices, says ABI. The research firm forecasts 75 percent CAGR (compound annual growth rate) for Linux in smartphones through 2012, making it the fastest-growing OS in the sector.

Two just-published market research reports bode well for Linux's future in the market for higher-priced smartphones. J.D. Power reports that rising smartphone sales are driving handset prices higher, while ABI Research predicts Linux will take a 23 percent share of the smartphone segment by 2013.

In China, the world's largest mobile phone market, smartphone sales for Q3 grew 11.3 percent quarter-over-quarter, reports CCID Consulting. However, Linux's share of the market declined, largely due to weakening volumes for Motorola smartphones, the Hong Kong-based market research firm reported.

"Linux went from 1.25 percent in May of 2007 to 2.02 percent in March of 2008. That is 61.6 percent increase in market share in nine months."

Android has overtaken Windows Mobile and Linux for fourth place in smartphone OS market share with 9.6 percent, says Gartner. The worldwide study of first quarter smartphone sales showed a 707 per cent year-on-year increase in Android sales...

Driven by smartphone sales, the mobile phone market rebounded with 21.7 percent year-to-year growth in the first quarter of 2010, IDC says. Meanwhile, as of April 1 Android was available on 34 different devices from 12 manufacturers, with Android ad-view traffic growing at a 32 percent rate over the last year, says AdMob.