I have had the Boom headset for a number of years, but I have had to stop using it due to an audio problem when using it with an iPhone 3GS. My headset was sent back to the manufacturer when it would not function at all with my iPhone. I was told that the problem was an improper impedance match between the two devices. When I got the headset back it functioned for a while, but then developed significant background noise (sort of a low static sound). It went back again, this time for about 6 weeks during which time it got a new microphone. It still has too much background noise and I have given up on using it with my phone. It's too bad, really, because I was quite happy with the Boom's performance prior to this. In fairness, Jeannie in customer service was very nice and helpful. Unfortunately, another customer service rep I spoke with was totally useless. In the end, I cannot recommend the Boom (at least for an iPhone).