There are two ways to get the Windows 10 Creators Update via the phased rollout. Automatically get the update automatically offered to you on your device. Manually update via the Software Download Site. The Update Assistant is recommended for advanced users on devices running a licensed version of Windows 10. The update for Windows Phone will follow the same phased approach, with rollout scheduled to begin in late April. We hope you enjoy the many new features it brings. If you have feedback about your experience, please use the Feedback Hub app.”]
Source: https://blogs.windows.com/windowsexperience/2017/04/11/how-to-get-the-windows-10-creators-update/