can i listen to pandora through the usb wire??

What type of phone are you using? If it's an iPhone, I don't think that it will function like an iPod would when you're using Pandora. I would assume that Pandora's software only uses the phone speaker or headphones as an output. So, you probably have to get a 3.5mm male-to-male headphone cable to use the "AUX" function on the radio.