So I recently had this issue and had the hardest time figuring it out when, in fact, it was quite an easy solution. I got a brand new iPhone due to the last one breaking. It is an iPhone 6s. I kept the plastic on it because I was waiting for my screen protector to come. Throughout the next few week's usage I had noticed that I can't hear people when on a phone call. I tried a ton to fix it and finally decided to book a genius bar reservation and had them explain that while the plastic seems thin, and while the plastic seemingly does not block sound, it in fact does block sound.


Take the plastic off when you get a new iPhone. That plastic will ruin the phone calling experience

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