In case you don't know how to read this thread, these are the suggested fixes for these problems: Turn off noise supression and other call optimizations in call settings Delete any apps installed that use the microphone Factory reset using Sony PC Companion Turn off Google app's "OK Google" detection on all screens Don't use a Live wallpaper Diagnosing: -If the person of the other end of a call can hear you at all, it's most likely the noise suppression issue -If the problem doesn't occur in safe mode, it's most likely an app causing it -If none of these fix your problem, it's most likely a dry join on the microphone connector For me, none of these suggestions fixed the problem. It intermittently worked so I got false positives all the time. In the end, I am 90% sure it is a dry join due to poor manufacturing. It seems to work ok in summer, but in winter the problem re-occurs. Thermal expansion? Obiously, take the phone in to a Sony center if you're still under warranty.
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