Nokia says it will continue to invest in Symbian devices, although Windows Phone 7 will be the primary platform for smartphones.

Recently, Nokia entered into an alliance with Microsoft for making Windows Phone 7 operating system its platform of choice. �This alliance was made as part of our long-term strategy. This will improve consumer experience across social networking, e-commerce and applications. The finer details are still being finalised. However, we will continue to invest in Symbian � on maintenance, new models and features. We have an installed base of 200 million Symbian devices globally,� said Mr Viral Oza, Head � Activation, Media and Online Marketing, Nokia India, on the sidelines of the launch of Nokia E7, a smartphone operating on Symbian OS.