I just noticed that my phone would not transfer voice to my callers during normal phone calls and I can hear whatever the other person says clearly. The annoying part is that it works great over WhatsApp, Skype or any internet calls
It wouldn't even work while using earpiece, or sometimes my caller will hear noise like radio tuned to no station and no voice at all over normal phone calls
Samsung Galazy S6 Edge (T-Mobile)
SM-G925T
Android version 7.0