Hello. During the past month I’ve been having the following issue with my iPhone X: I am unable to make calls (the service drops to zero after I place the call) or to receive calls (whenever I am called, the service also drops to zero, and stays like that for a few seconds; the person calling me...

Hey, I have a problem with my iPhone 7. It happenned after installing the update. My phone got turn off sometimes without reason. Also, when I call someone (or someone call me), I hear nothing, also my interlocutor can't hear me. Voice settings are okay (everything is at the highest sound)...