I have the same issue but other then those dark screens I never notice the spots so until i start to notice them it isn't worth the return if that's the only issue. I had extremely bad luck with 2 Rezounds before this so I'm happy to take a few blothes on a dark screen. It is something with the specific glue they used for the screen type. I'm pretty sure almost all have it to some degreee. Some just can't see it or aren't aware of it. I wouldn't stress too much over it. A replacement, IMO, seems futile if the rest of the phone functions fine.