https://www.bleepingcomputer.com/news/microsoft/windows-10-insider-build-17730-is-now-available-here-s-whats-new/

Today Microsoft released Windows 10 Insider Preview Build 17730 (Redstone 5) to the Insiders on the Fast Ring. This build continues to enhance the Your Phone experience with Android photo synching and iOS "Continue on your PC" being enabled. This build also introduces HTTP/2 to Edge and lower network latency with Cubic, the new TCP congestion provider.