TechFreak1
Moderator
As Daniel Rubino, Tom Warren and Joe Belfiore have said 1000000times. The Dev Preview is not a flipping BETA. Jesus Christ man, it is ahead of the 630's original release for crying out loud
To add to that the Lumia 930 is running the same o/s build as the dev preview,
As I noted yesterday in our unboxing and walkthrough video, the Lumia 930 ships with build 12397 of the Windows Phone 8.1-operating system . For those keeping track, build 12397 is the same version as the current Preview for Developers, which, of course, means that what you have is not a beta release. The only difference is the Lumia Cyan firmware, which is tailored specifically for each model of Windows Phone. Firmware is super important as anyone who has updated a PC knows as it can allow certain drivers to work, optimize performance and enable certain functions.
quoted from this article:
Lumia Cyan and what it brings to Windows Phone 8.1 and the Lumia 930 | Windows Phone Central