Qualitatively very inferior and defective

That the part is not sent from Germany came very quickly to me. After a first optical visual inspection I could not see any damage. But what immediately stood out was the bad adhesive pads that had already partly detached from the spare parts. I began my iPhone apart and screw on the new part, which has yet to be broken in several places, so that it fits in the iPhone to install. Unfortunately broke away due to poor processing the splices. After the iPhone was screwed together again, I realized that it was no longer turns on. So again everything disassembled and again controls everything piece by piece. No Success. So one last time again screwed everything and installed the original part and now my iPhone goes on again. The spare part I have thrown in the trash and now live better with a broken power button.