Vulnerability corner between headphone jack and microUSB input

In my part of the shell of the hard shell between headphone jack and micro USB input is canceled and the at normal use. According to dealers, a mechanical damage by the guarantee is not covered, you have to live with it so that the shell does not keep long. Does not seem to be produced for everyday use. I had the envelope for half a year. The corner is anyway a flaw on the envelope because next to it is on both sides a lot of unprotected edge.

The casing makes the phone feel much larger. But you get the feeling that it is being protected. Fortunately, I have no experience with falling.