NewsLeaks / GrapevinesWindows Phone NewsWindows Phone Devices Windows Phone 8.1 demoed on a Lumia 520. By Nayan - February 23, 2014 3 A video has been posted in Vietnamese language, which reportedly demos Windows Phone 8.1 on a Lumia 520. Though, there are apprehensions of it being fake, but from the video it does look like Windows Phone 8.1. What do you think? Thanks Phoc for the tip. Cheers!! Share this: