Even with Microsoft's 2014 BUILD conference just a few days away from starting in San Francisco, more leaks about one of the event's big topics, Windows Phone 8.1, continue to find their way to the Internet. Today, two videos from a Chinese source show a build of Microsoft's mobile OS running on the still unannounced Nokia Lumia 630.

The videos were originally posted on the Chinese website Coolxap, but have been converted and uploaded to YouTube via WPCentral. One of the videos is over 3 minutes long and shows several aspects of Windows Phone 8.1, including the new look of the app store section, a new Podcast app, changes to Internet Explorer and more. However, the video is definitely on the "Shaky Cam" side so the quality is not the best.

The second shorter video shows a specific Windows Phone 8.1 feature, which will allow users to put in their own Start screen background images. The clip, which again doesn't have the best quality, does give an example of how users can select photos to be placed behind the Start screen, which adds another nice layer of customization to an OS that already has a lot of those features.

Hopefully Nokia will finally reveal the Lumia 630 on April 2nd as part of its own press event in San Francisco. Neowin will be attending the Nokia event as well as the BUILD conference.

Source: WPCentral on YouTube via Coolaxp.com