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A few people have been lucky enough to download the new Windows 10 for phones build 10051, while many others are still pressing "check for updates" button every 10 seconds. We've just installed it on our Lumia 635 and we're now exploring the new features. You can see the full changelog here. While you're still waiting, check out some of the screenshots we've collected so far!
Read more: Here is what is new in Windows 10 Technical Preview 10051 for Phones | Windows Central