I was very disappointed in this device with my Verizon Razor V3M phone. The sound quality on the other persons end was "distant", "tinny" and the headset itself crackled LOUDLY with static. It reminded me of the old GI PRC-4 (the huge "walkie talkie in WW2 movies) in sound quality.It does avoid picking up background noise, but it does so via a "auto-mute" which folks I was talking to found most disconserting. Rather like an old speakerphone. It is a good feature. Just not there yet.On the assumption it might be my phone I also "bound" it to various other phones and all had similar results.Also the ear clip clamps painfully tight onto ones ear. You don't notice it for almost 2 min, but then it gets increasingly discomforting. Sort of like trying to wear a clip-on earring on your ear proper not the lobe. I have returned my Sony Ericsson HBH-610a Bluetooth Headset for a refund and have gone back to my old jabra BT350 headset with renewed respect for it.