Lumia Cyan is set to roll out for existing handsets all across the globe, and Nokia even updated its software update page for those who want to know about its progress for their region.
For now, users enrolled in the free Windows Phone 8.1 Preview for Developers program should keep checking as an update is rolling out for the preview with build 12400. The update doesn't appear to be a big one, and does not bring any feature that's a part of the Cyan update.
The update will start rolling out starting 1PM ET, so make sure you check for the update if you're rocking the developers preview. We'll update you once we find out complete details about what the new update has to offer.
Check your phones and grab the update. Let us know if you notice any new improvements.