The volume is good on incoming call ring and callers can hear me. The volume on incoming calls is very low even with the volume control up to highest level. This is a new problem but only have had the phone 3 months
Check your manual to see what the degrees it can operate in. If it's 80 degrees outside, inside your car will be around 100 degrees. It's probably better to have your phone with you instead of possibly damaging your device. Electronics sorta hate hot conditions.