Windows 10 Mobile Creators update roll out begins to supported devices

Finally, Microsoft has started the official rollout of Windows 10 Mobile Creators update (build 15063.251) for supported devices. The update does not bring any big feature, other than, minor changes like fixes and improvements to Microsoft Edge, Cortana, Continuum, Windows Store and more to make the overall experience with the OS more smoother. 

If you're device is on the eligibility list, you can go to Windows Update to download the latest version of Windows 10 Mobile, if it's available in your region.

Devices that are eligble for Windows 10 Mobile Creators Update include—
HP Elite x3
Microsoft Lumia 550
Microsoft Lumia 640
Microsoft Lumia 640 XL
Microsoft Lumia 650
Microsoft Lumia 950
Microsoft Lumia 950 XL
Alcatel IDOL 4s
Alcatel OneTouch Fierce XL
SoftBank 503LV
VAIO Phone Biz
MouseComputer MADOSMA Q601
Trinity NuAns NEO

If you're device is not on the list, you won't get Windows 10 Mobile Creators update officially, and remain on the Anniversary Update. However, you'll most likely get security patches in near future.

Microsoft says the update is rolling out in waves across region, so it may take a few days for the update to hit your device. Also the update availability can depend on the manufacturer, device model, country or region, mobile operator or service provider, or the installed software.

Source