On August 10, Microsoft released two new Windows 10 test builds: A “Redstone 5” test build to the Fast Ring and a “19H1” build to the Skip Ahead Ring.
The Fast Ring test build, No. 17735, includes no new features, but quite a few fixes. It also includes many known issues, which are listed in the blog post. Microsoft is expected to roll out Redstone 5 to mainstream users starting around October 2018.
The Skip Ahead test build, No. 18214, includes several features new to that build, which already are in Redstone 5.
The Microsoft “Your Phone” app now works with Build 18214, as it alreaedy does for Redstone 5 testers. With the current build on Android, testers can get immediate access to their most recent Android photos on their PCs, so they can copy, edit or ink on those photos. On iPhone, the YourPhone app only allows users to pick up on their PC where they left off in their browsers on their phones.
Build 18214 also now includes HTTP/2 support, as well as CUBIC (the new default TCP congestion provider) support. Support for these were added recently to Redstone 5.Build 18214 includes a number of fixes and known issues, as well, that are listed in the blog post.
Microsoft will likely not begin adding any major new features to Skip Ahead builds for a while — most likely some time after Redstone 5 is deemed “baked” and closer to roll out to the mainstream.