Welcome to the big leagues, Windows Phone. You’re now being recognized as an operating system by Google Analytics, rather than being generically reported as “not set.”
WP Sauce noted the change this week and alerted us to it. However, it appears to be something that happened back on November 15. I found Windows Phone appearing in several Google Analytics accounts I checked as of that date.
Here’s an example of it beginning to be found in one account:
Unfortunately, we cannot see which devices are being used with Windows Phone. This information could be very useful when optimizing the Windows Phone experience.
As shown in a research on mobile usage, the customer behavior (and conversion rates) differ significantly between devices, OS and platforms (App or Mobile sites).