iMore

I have a Verizon iphone 4 phone I received two days ago from online purchase. It would play Pandora first day in Tacoma by plugin accessory on trucks radio. Second day no truck radio function through accessory cord so I unplugged it from radio, headphones work fine. Then the ringer quit functioning on incoming phone calls. I can listen to Pandora on headphones. If I switch ringtones the test ringtone will ring through the phone but incoming telephone calls will not ring external ringer, it does ring through headphones. Any ideas?, tried cleaning ports with compressed air in a can, wooden toothpick while phone was off, reset with on and home button at same time, hard reset.