I have been fighting with this every since I got my iPhone 7 Plus on day one. I'm having a big problem where when ever I made a phone call I can hear the person on the other end just fine but they have a hard time hearing me, the call will constantly break up. It will break up so bad they can't understand anything that I am saying but I can hear them just fine, it's not breaking up at all on my end. This is only when on a regular phone call, if I make a FaceTime audio call its perfect no issues or use a 3rd party app like Skype no problem. I have been though 4 phones and 2 carriers (Verizon and AT&T) while still having the same issue. I have moved once so its not a area thing. If I call up the carrier they have no idea what to do. I have tried restores, fresh iOS install and brand new phone. But can not get away from this issue. Has anyone had this or have an idea on a fix?