I saw this "hands on" video and she had some complaints regarding the phone so I sent her an email and she responded me:
" the phone has plastic sides. The PR agent who showed me his white phone was wearing black pants. After only a few days with the device in his pocket, the dye from his pants transfered and stained the white plastic of the Z2. This probably happens because of the texture of the plastic. It is a matte finish when it should be glossy for white for the exact reason I am telling you here.
I don't know if they will fix it. They will need to change the plastic... Or seal it from stains. We shall see."
What do u guys think about this? Maybe the PR agent had new pants on
and thats why the phone got colored