Microsoft launches Windows Phone 7 Series for mobiles
The software has a redesigned user interface and incorporates many Microsoft services such as Xbox LIVE games and the Zune music service.
According to research firm Canalys, Microsoft’s software currently has around 9% of the smartphone market.
That puts it fourth in the global market behind Symbian, Rim (makers of the Blackberry) and Apple’s iPhone OS.
Microsoft’s new operating system is built around a series of so-called ‘live tiles’, which pull in real time content from a users web sites and social networks.