Best Calling Card

Does anyone else have callers complaining about, what sounds like, a buzz saw when you are using a BT device on the Pre?

 

I have a Phone Labs Dock-N-Talk, that I use with my cell.  I have used D-N-T since they first arrived on the scene.  I have been through several firmware upgrades and even replaced it last year with a newer model. I have never had any issues with it, ever.

 

Since the arrival of the Pre, my callers complain about hearing a buzz saw sound. I never hear it on my end.  They say it’s much louder when they call me than when I make the call.

 

To eliminate any possible environmental interference, we went so far as shutting the main circuit breaker to the house and running the D-N-T on my APC battery backup normally used for the computers. We then removed batteries from the 2 cordless phones. That made no difference.

 

I shipped the D-N-T back to Phone Labs thinking it had gone bad, and they cannot get it to fail.  After extensive testing (they had no Pre to test it with unfortunately), they sent it back for me to try and it still has the same problem.

 

Any thoughts?

 

Thanks!