The S9 is a great product except for one glitch. The Bluetooth antenna is located on the back of the headset, so if the source is not located towards the back of your body, no signal.I first tested it out inside my home, and it seemed to work great, even with my phone in my front pocket. I next used it in my car, and same result, it worked fine. However, when I went outdoors and there was nothing to "bounce" the signal, it did not work. I tried placing the phone in an armband and positioned the phone on the back of my arm and it seemed to work okay. I am an avid bicyclist though, and have a mount on the bike for my blackberry, so I can use GPS software to monitor speed, distance, and elevation. With the phone mounted in front of me on the bike, I get no Bluetooth signal to the headset.Bottom line was, outdoors, without the placing the source in an armband or belt clip positioned towards the rear of your body, you will not get signal to the headset. Very disappointing, because the S9 had good sound quality, great controls for avrcp, is water-resistant, and was comfortable to wear.