@evleaks just posted a link to the image above; stating that it was taken with a Nokia Lumia 928. According to the Exif data on the image it was indeed taken with a Lumia 928, running Windows Phone; the claim is solidified by the fact that the person who posted it appears to work at Nokia according to his G+ profile.
The photo has been removed from the Picasa link, luckily we were fast enough to get a screenshot of the Exif data (you can’t hide on the internet).
*The photo above is the original image and not a screenshot; for those of you interested in a closer look.
— @evleaks (@evleaks) March 13, 2013