I want to know one thing about Bluetooth cell phones that if a cell phone is Bluetooth capable does that mean I have to buy a Bluetooth or is the Bluetooth built-in on the cell phone? Also if my car has Bluetooth, does this mean my phone will automatically be picked up on the radio or is there a purchase I need to make? Or how do I connect my cell phone to my computer using Bluetooth? Please help me out any advice will be helpful.