**Using this with the iPhone 3G**  This is my second Plantronics headset and I'm very impressed.  I did get a cheaper headset inbetween the two and it wouldn't even pair with my iPhone.  So I went back with what worked.  It paired easily and has been doing well.  The one thing that I have a problem with is the distance.  They say I can go up to 10 meters away and still not have a problem.  I'm sure that distance is padded a bit, but I have problems if I even go upstairs.