A video of an unreleased build of Windows 10 Mobile has been spotted in the wild. The video shows build 10151, which introduces new animations for when you open apps on the phone.

As well as the new animation, the build seems to be more stable and sports a more fluid experience. This is something we expect with later builds of the upcoming operating system update, which is set to arrive sometime later this year.

It's not known whether or not build 10151 will be released to insiders, following on from the build 10149 leak. Sit through the video above and let us know your thoughts on the new animation in the comments.

Source: Neowin