Photos only appeared with a veil of mist. Very annoying for a cell phone in the upper price segment.
For the repair I did not want to give, so I've tried the "red and white polishing paste acrylic & plexiglass" the phone. After only a minute polishing with a pulp handkerchief and a slight pressure, I am simply amazed and forgive 5 Stars. The photos before / after I reduced and uploaded.