When I try to make a call, the person on the other end answers the phone but I can't hear them and they can't hear me. The seconds tick by to show we are connected but we can't speak to each other.
Welcome to the community. I am sorry to hear about this issue.
Can you please test the microphone? To do this go to Settings > About Phone > Diagnostics > Test > Microphone. See if you can record a sound and play it back.
