This problem has been plaguing me for years, finally figured it was time to create a forum topic on it to try and get some help.
My wife and I both have Samsung Galaxy S4 phones (model number SGH-M919, current android version 4.4.4), and this is a problem with both of our phones.
Whenever someone calls me, and I answer, 9 out of 10 times they will not be able to hear me (but I can hear them). When I try to hang up, the phone app freezes for 5 - 10 seconds, and sometimes an error message appears saying the application stopped/errored/etc.
If I call someone they can always hear me just fine.
This also only happens if I am using wifi for phone calls... if I change the setting to Cellular Preferred, then no problems at all when people call me. We just moved and I don't get that great of a signal out here, so I have to be on the wifi when at home for phone calls.
Any help/advice is greatly appreciated, thanks!
Here are a couple things I have tried so far and none of them made a difference:
* Turned off S Voice
* Checked and unchecked "Turn off screen during calls"
* Checked and unchecked "Noise reduction"