I use the shell for exactly one year, the protective function against drop is good (more than once involuntarily tested). The phone was never taken during this time of the envelope. When changing the battery, I realized now that the metal frame is damaged in many places, especially on the edges. Here, small dirt particles have properly pressed into the metal, leading to no longer to be removed changes (exactly as described in the review by Björn Hanson). The dirt particles act in the narrow frame like sandpaper. The mobile phone is thus irreversibly damaged and certainly not high resale value longer. Other phones in our family who were protected with another shell (Vau Snap Case Slider), are completely free from this damage and look like the first day.
