Possible design for new Nokia phone
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Can Windows phone save Nokia?

5 September 2012 Last updated at 11:17 BST

Nokia and Microsoft are to co-host a press event in New York where they are expected to unveil devices running the new Windows Phone 8 operating system.

It is a critical event for Nokia after it surrendered its 14-year position as the world's biggest phone-maker to Samsung in April.

Mark Gregory reports.

Pictures of iPhone mock-up courtesy www.theverge.com