Haven't heard from anyone out there... but I have an update. It appears that the tone is audible in synch with the standby light only when the BB is searching for the network/phone signal. Bottom line, I suppose it is good to get an indicator of lost service, but it is a bit annoying. I happen to live in a marginal coverage area, so I have to keep it out of my ear until I get to more normal coverage. Otherwise, not a bad unit. More comments posted under "Review" thread.