“If u get a car radio without Bluetooth but is iPhone compatible or iPhone ready do u need wires for music or phone calls through radio? When looking for a new head unit for my car I notice the smartphone ready with no Bluetooth what does that mean without Bluetooth but it being iPone ready or compatible?? Do I still need a usb wire or aux wire to play music through the radio or answering calls or texts through the radio???? My goal is only have a wire if my phone is charging what do I need Bluetooth will obviously let me do that but they r kinda expensive so if I get one without Bluetooth but is smartphone compatable am I still going to need a wire from my phone to the head unit??? PLEASE HELP QUICK!!!!”