I have a Z3+ my fourth device actually. The first two had the same issue as this. The 3rd didnt but I had to sell that on anyway.
The problem is that on a black background, waiting to load the camera...loading images....choosing a wallpaper etc, I notice some strange blue spots. The first z3+ was sent to SBE to be repaired but came back unrepaired. The easiest way to see this is to run the *#*# service number and do a display test. It's clearly visible. What is this? It's happened to 3 different devices.
