I cannot hear the other person and they cannot hear me, why?

[AC Question]

I am unable to hear the other person and they can't hear me. All of my tones are on. I checked the mute and it is off. My phone will ring and I can hear that. However, I cannot hear the phone ring when I am calling out.

 

[nahoku]

You might try contacting your carrier to have them check your connection.