A:AnswerHello. If your cell phone audio is what you are looking to play through your cassette player on your radio, then yes, your cell phone would need a 3.5 mm headphone jack output to pass the audio.
A:AnswerI don't use siri on my phone it causes more harm than good. That's an apple issue I believe not something planned with this device. Disable
Siri if you can live without it
A:Answer3 possibilities that I've found to happen; your car is too hot, car's too cold, (both with the casette in the car during the more extreme conditions), or it is or it's about to break.
