Microsoft has issued a version of its Silverlight web application framework designed for mobile phone handsets based on the Symbian mobile OS.
The company released a Silverlight port for Nokia 5800, N97 and N97 mini devices running the fifth edition of Nokia's S60 Symbian Linux-based mobile phone OS. Silverlight for Symbian is available as a free download from Nokia's Ovi app store.
Microsoft's own smartphone platform, Windows Mobile, so far provides no support for Silverlight or even Adobe's Flash.
The release of its port to Symbian indicates that Microsoft is planning to promote Silverlight on rival devices before the launch of its own Windows Phone 7, which will be heavily based on the platform.
ZD Net UK has also reported that the Silverlight for Symbian released by Microsoft comes with support for H.264 video format used by YouTube and Microsoft's own IIS Smooth Streaming extension.
Developers will be able to come up with media-rich Silverlight applications for the 20 million users of Nokia 5800 and N97 handsets around the globe.