Like I said, these units are very sensitive to the phone being used. I didn't test it on a 7290; however; remember that I am comparing units and go to a noisy environment before you are certain. Of course you were comparing it to several headsets that I didn't test. You will find some that praise the Jabra BT250 which you condemed. I am trying to give you a fiar assessment of the units i tried on the phones I have. I have aslo given you my biases. I certainly don't disagree on the issue of comfort as the HS850 is very comfortable. Saying that, I still found the BT800 more comfortable once I got used to it. Neither is as comfortable as the Tekkeon ET2000.