... And another one here as well ... . No cover, no dirt, so a proximity sensor problem. Both soft and hard reset did not help (a soft reset caused OneDrive to malfunction, so I was forced into a factory reset anyhow, luckily my settings were synced beforehand).
In 90% of ordinary telephone use the screen turns black, slight pressure or stronger wiping in the prx sensor area is needed to get the screen interface back while calling. In 10% of the cases it starts to function normally, but then only for a short while.
Otherwise the device does work very well so I am hesitant to return right now (particularly since I am not certain about what I will get returned), but this problem simply should not happen, certainly not in case of a flagship model, since it seriously hampers
the phone functionality.
This seems one serious problem, particularly since it has plagued many Lumia types. Lets hope somebody at Microsoft picks up and takes it seriously.
BR, Nexhmije