the tp2 can handle up to a 32gb card. i use my sprint tp2 as my mp3 player in the car. ive got over 10gb of music on my 16gb card. i use my tp2 and a 3.5mm audio cable connected to a pioneer cd player with 3.5mm input jack in the front. it sounds great and i never have to worry about scratching a cd!
i say stay away from those little converters that plug into the cigarette lighter, they sound horrible. if you cant plug the tp2 directly into the car radio using a 3.5mm cable, usb, or bluetooth, i wouldnt bother since the sound quality will not be that good. hope that helps!A
also, i can answer, hear and be heard during calls with no isues thru the car radio
