A video showing Nokia Phone with Microsoft Windows OS has leaked. The phone is a result of the partnership that was announced this year between Microsoft and Nokia.

Nokia had its own mobile OS – Symbian which now will be abandoned and replaced with Windows Mobile.

The prototype runs Windows Phone 7 Mango, the latest version of the OS.

Over the last few years Nokia has lost a lot of market share while trying to integrate with the new generation of smart phones and various apps. This led Nokia to join forces with Microsoft and regain market.

Starting 2011 the new Nokia devices will launch in Europe.