"Can't hear my phone calls. How to fix it?"に関する回答Got this same issue and brought my phone to the apple store several hours ago. Tech can't resolve the issue so he gave me a new iPhone 6 plus but I found out after restoring from icloud that the problem still persists. Issue was resolved by resetting the phone again and not restoring from icloud but setting as a new iPhone. At last I could receive and place calls again by not pressing the speakerphone. Problem is I now have to install all my apps manually.