Windows 10 build 15055 ISO and ESDs are now available for download. The new insider build was released recently for Fast Ring members which bring bug fixes and other improvements.
Windows Insider team also rolled out Windows 10 Mobile build 10.0.15055.0 for Fast ring members with improvements.
However, some insiders are unable to download the latest build and looking for ISO images and ESD files. Download the Windows 10 Creators Update Build 15055 ISO image from the link below.