Tried bringing it back to factory settings but with no luck. Also I only have room for one inbox on one homescreen.. Kind of hard when I use 3 for work :-( This Belle was a downgrade!
Well, I have tested a bit more and it seems that the sensor is the problem. Because when I make a call the screen goes black aswell. Strange that this came right after bella upgrade.. Guess I'l have to hand it in to Nokia.
I have the very same problem since a few weeks ago.
As the user has stated, it's working perfectly, i'm looking at the screen and its perfectly clear, but if i have an incoming call i see the screen going black until call ends, in wich moment the screen turns on again.
So I think it is no dirty-sensor problem.
I can only recognise calle by changing tunes...
Apply some pressure with your finger on the proximity sensor.
I had the same issue for around 6 months. Now it's fixed