We are expecting the Windows Phone 7.8 update to drop sooner rather than later, however we have yet to get anything specific in terms of when. Of course, even once available it will likely rollout in various stages based on market, device and carrier. That aside though, it looks like at least one device is running the update now. The handset is a Nokia Lumia 510 and despite the less than stellar specs, the update appears to hold up nicely. That said, the video is above and it is showing a look at Windows Phone 7.8 build 8858.136.
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