Using Ubuntu 12.04, I plugged in a generic Bluetooth dongle, hoping to transfer some graphics from my cell phone to my desktop. I was successful in transfering my contacts from one cell phone to a new one by this method. The Bluetooth symbol appears at the top of my desktop screen, but when I have it search for devices, it only returns "not found."

Am I missing something, or is there an unknown incompatiblity between the dongle and my cell phone?