Chosen Solution
When synced to my car the sound doesn’t work when I get inbound call. The call connects I say hello over and over no one can hear me. It works fine on outbound calls from car. How do I fix this?
Perhaps try to reset your phone by holding down the home button and the button on the right side together till you see the apple logo on your screen. It will not really reset anything important (data, etc will all be safe) it’s more of a restart, but it restarts the whole system rather than shutting the phone down and turning it back on. Also, if the sync system in your car has a restart/reset option, also try doing that and re-connecting it to your phone.