Hi everyone, I have an iPhone 7 256GB unlocked black with iOS 10.1.1 and this last week I made three facetime calls with three different people using the speakers on all three calls. Two of them have a crackling/tapping sound ONLY when the other person speaks. I was not able to locate exactly where the sound was coming from. First call: the other person (iphone 5s iOS ?) was using the speakers = CRACKLING/TAPPING SOUND. Second call: the person (iphone 5s iOS ?) was using apple earpods headphones = CRACKLING/TAPPING SOUND. Third call: the other person (iphone 5 iOS 10.1.1) was using speakers = NO ISSUE. When using the speakers for music etc... no issue. Anyone having this issue? iOS issue? iPhone issue? What should I do? Thanks!!!