AdDuplex, the largest cross-promotion network between Microsoft (MSFT -0.27%) Windows Phone and Windows 8 apps, recently released its worldwide monthly findings, showing Nokia (NOK -2.74%) pulling more than its weight for Windows Phone. In particular, nearly 75% of Windows Phone devices in the world are now made by Nokia. In this video, Motley Fool contributor Steve Heller discusses which company is bearing more risk and if there are any potential bright spots to the story.