@George_San_Jose1 but with aux all you have is a cord and you can listen to anything with just the phone
If you mean using your cell phone to play a cell-phone mp3 file, and listening to the audio output via the aux input to the carās stereo, yes, that method also uses no moving parts & is equally effective. Many car stereos donāt provide an aux audio input though.
@George_San_Jose1 I use cassette tape aux. Didnāt even know technology like that was possible