Nokia announced today that they will adopt Windows Phone as the primary operating system for its future smart phones.
Coming from the world's largest mobile phone manufacturer, this is a historic announcement.
While the vast majority of PC malware is written for Windows, Windows Phone 7 is a entirely different ballgame.
The security model of Windows Phone 7 is quite different from Windows XP/Vista/7/et cetera, and includes features such as Application Certification, Isolated Storage, and Application Isolation. For example, third party applications can not run in the background because of security concerns.
Windows Phone 7 and XBOX are the only Microsoft platforms where applications must be pre-approved by Microsoft before users can run them.
As a result, we don't expect any major mobile malware outbreaks just because of Nokia's partnership.