Microsoft unveils Windows Phone 7

Windows Phone 7 Series coming in 2010

Microsoft has officially launched the next generation of its mobile operating system.

Steve Ballmer, chief executive officer at Microsoft, unveiled the Windows Phone 7 Series at the Mobile World Congress yesterday. It is the company's latest attempt to become a serious challenger to the likes of Apple, Google and Nokia in a growing sector filled with lucrative mobile marketing opportunities.

Several major manufacturers have already licensed Windows Phone 7 for use in future devices, including HTC, LG and Samsung. And it is expected that the UK's Big Four mobile operators