I do not want to leave any negative reviews. So I am writing here what happened. I bought the USB data cable for my Samsung Sprint cell phone SPH-A840. It came with no car charger. It didn't work out with my Dell laptop which has winXP. I downloaded the software that come with the cd, but didn't work. I downloaded the software from Samsung website. It didn't work too. I tried the same thing with my PC at work, but again it didn't work. I didn't ask the seller's help, neither anybody's. So I do not know if there is somthing to do about it, or not.