Display glass with different surfaces

I have this on my 820 and also my wife had this issue with her 620. We have sent her 620 back to Nokia to get them to look at it. We should know in the next few days what they are going to do about it.

We have now heard back from Nokia. Basically they replace the 620 with no issue at all. I have seen the same on my 820 as I mentioned before and will be talking to Nokia in the next few days to find out what they will do with that phone for us.
 
I thought the problem was gone. But I'm back with the same problem just at a different spot of the screen. The faulty surface is a fingerprint magnet. The touch and feel is the nearly the same( the faulty part has a slightly higher frictionalresistance). Just the fingerprints stay longer.
Because of the longer summer days(more light) i wasn't kind of pleased with the screen problem.
I drove to a local Nokia-CarePoint and ask if they heard of the problem and if i should send it back again to get it replaced. Because of bad lighting it was hard to show and describe the problem. They never heard of that problem.
To my surprise they asked me if i could come back in 1 hour to get my device back with a new screen :) And so i did.

And finally my screen is perfect and without any problems. Tested it 3 days to check whether the problem will show later. Nothing has changed, the screen is as you would expect.

The problem was annoying and i really would had liked to get a perfect device directly. But i can tell you that I am really happy with the customer service from Nokia. Especially the Nokia-CarePoint service was friendly. I used the website, the chat and the CarePoint and always had the feeling someone at least cared about getting me happy.