Microsoft is now testing Windows 10 v1809 build 17759 internally. The new Windows 10 October 2018 Update (Redstone 5) build 17759 (10.0.17759.1 rs5_release.180910-1322) was compiled on September 9, 2018. We are now getting closer to the RTM build.
Previously, Windows 10 Redstone 5 build 17755 was released for Fast Ring Insiders. This build includes various improvements and changes as well as removed the watermark at the lower right-hand corner of the desktop.
In addition, Your Phone app has added support for text messaging. Apart from this, the latest build also fixed an issue resulting in Windows Hello spending more time in the “Getting Ready” state in recent builds.