I guess I'm confused!
In reviewing Microsoft info from the phone (by selecting (Cyan in Extra's + Info), the 635 on AT&T is supposed to be able to receive the update to Denim. I have an unlocked Post Paid AT&T Nokia 635 on AT&T paying the normal monthly fee, not Go Phone. I received some update about a week ago, thought it was going to be Denim, but it was some stability type update as indicated. When I check Extra's + Info, Cyan is still listed.
Now I know I can install the Win Preview Program update to go to Win 10 and the first update will be Denim, then the other updates, but I was hoping to get it naturally from AT&T.
Any detailed suggestions on best way to proceed.