Announcing Windows 10 Insider Preview Build 16257 for PC & Build 15237 for Mobile

Today we are excited to release Windows 10 Insider Preview Build 16257 for PC to Windows Insiders in the Fast ring and also in Skip Ahead! We are also releasing Windows 10 Mobile Insider Preview Build 15237 to Insiders in the Fast ring.

https://blogs.windows.com/windowsexperience/2017/08/02/announcing-windows-10-insider-preview-build-16257-pc-build-15237-mobile/