I can only agree with the preceded reviews. But unlike other opinions but positive things to say. I bought the Samsung Star 5230 new and when the protective film, which is in the factory on the phone, and then immediately pulls down the protective film from mumbi draufmacht, one has no particle of dust in between. The film attaches itself immediately to the phone and that you should check with a card attach the film but the film sucks actually almost by itself on the touch screen. There is no bubble. Whether the installation works well so when some time benutztem phone, I can not say but I would display with a microfibre cloth and a spray which is also used for display cleaning of laptops, clean, then probably it is no more dust. The standard film which is in the mobile phone at delivery it is shiny and one really sees each finger on it. Although the film of mumbi shines not so beautiful because it is dull, but I find it even more quality, since we do not see each finger and the film also has a nice strength. The touch screen works irreproachably and I find even that the traction is better. Super product. Would I order again and again.