Can't hear voice on calls or music
Hi, not sure if it is related to the software update I installed day before to ios 10.2.1, my iphone 6S plus suddenly went silent. I cant hear any voice on calls and the other person cant too. There is no voice while playing music. I tried Itunes, youtube and different music apps. However, I can hear over calls when talking on speaker which means my hardware is just fine. No physical damage happened too. I also restarted my phone which did not solve the problem. Please help me to troubleshoot this.