Okay, I don't know how or why but whenever I receive incoming calls my phone restarts itself and whenever I call someone my phone restarts itself. Default phone app / manage calls applications got deleted somehow. Even that I'm using phone call by google app, I can't seem to be able to call anyone nor manage to receive any incoming calls. I tried installing phone services few times hoping that would work but nothing happened. I don't want to reset my phone at least not if there's any sort of chance to solve this problem.