Got it just in time for the new law in CA. It paired up no problem with Samsung U540. Using it to access the phone's voice-activated dialing system is great - a bonus I didn't expect to get. There is no need to touch the phone at all to make calls from your phone book or to call the number of your choice. Callers on the other end tell me it sounds like any other phone call, and I hear them fine. It is smaller than you might think, and it is plenty loud. This has got to be better than driving around with one of those ear hooks on.