Hi all, Would appreciate you could kindly help me with a random issue I'm having on my iPhone 7 running iOS 10.3.3. Past 2/3 months or so when making or receiving calls, I can hear the the other person but they can't hear me. It's completely random. Ending the call and re-dialling usually resolves the problem. I've dropped my phone a few times, could it be that my mic is damaged? Any way of finding out? Many thanks.