Can't hear callers
Ever since I updated my iPhone 7 to iOS 13.4.1 I can no longer hear the callers unless I restart the device, which seems to be working for the first few calls, then I can't hear anything again regardless of using the speaker, headphones or normal call.
I have updated iOS to 13.5 and the problem is still persisting.
I cleaned the microphone externally and nothing seems to be obstructing it.
iPhone 7