Hello, you should check the microphone on your device are not clogged, also you should check out the seetings for voice and call settings.
@MzRedd59 Hey there! Have you try to turn on the HD Voice? Please, follow the next steps:
> Go to Settings.
> Advanced Calling.
> On ADVANCED CALLING tap the gray icon then it will turn blue.
> Tap OK
Let us know, if this works.
Social Care Agent