Windows Phone 8.1 Update 1 was announced last week by Microsoft and includes a number of new enhancements and features which further align the mobile operating system with competing platforms. Today, Microsoft has released this new update for those who have registered themselves in the Preview for Developers.
The Windows Phone 8.1 Update 1 preview for developers has started rolling out now, which means it should hit your device momentarily. You can check to see if the update is available by opening Settings and navigating to Phone update > check for updates.
Those in on the preview will receive the final, RTM edition of Update 1, much like preview users did with Windows Phone 8.1 and Windows Phone 8.0 GDR3, so no worries there if you were wondering whether the update was currently in beta. It's stable.
Windows Phone 8.1 Update 1 will hit consumer devices over the next few months, so if you don't want to wait until then, make sure you've enrolled in the Preview for Developers.