Market research company IDC thinks that by 2013 the Google Android operating system will be the number two operating system for smartphones.

And by then the converged mobile device market - that's IDC jargon for smartphones will be 390 million units.

Android thingieBut, thinks IDC, Symbian will keep the dominant position worldwide from now until then. The reason for that s that Nokia is the dominant player outside of the US.

Android, starting from a very small base of 690,000 shipped units in 2008, will reach 68 million units by 2013 - that's a CAGR of 150.4 percent.

But there's bad news for Linux and webOS - these wil decline as other handset vendors take up Android. Palm's webOS will grow but will suffer limited market share because it's not available across multiple carriers.