A USB Datasync cable does two things: it allows you to charge your BlackBerry smartphone by plugging it into a USB port, but it also allows you to transfer data, such as pictures and music, between a computer and your BlackBerry smartphone. What my friend had bought was a cable, but it was only a charging cable. This is why his computer was not recognizing his device as a BlackBerry smartphone. He went and dug the packaging for the USB cable out of the garbage and sure enough, it was a charging cable only.