A non-final build of Windows Phone 8.1 was shown running on a Nokia Lumia 920, giving us a good look at some of the upcoming features in the operating system update. In the video, embedded below, we get to see Speed Dial, an improved Internet Explorer, an improved Calendar, the addition of Battery Power Sense, an improvement to the Photos Hub, the addition of Storage Sense, Podcasts, and more. The video does not feature the new Action Center or the Cortana digital assistant, which is expected in the final build of the update. You can also take a look at a list of revealed features expected in the update, courtesy of two developers who got their hands on the SDK of Windows Phone 8.1. If you are interested in checking out the build, take a look at the video below.