Well, I am getting closer to pulling the trigger on BT headsets. I think my VOICE II is not easily troubleshot or fixed.
I like wired connections.
Have you considered using the J&M CB2003? It has rider passenger intercom. I can't remember the comm option BMW was offering when I purchased my 2001 LT, but I decided to use the J&M to get CB capability (my brothers and I communicate on the CB and it is a good way to listen the the trucker gab). Once I learned to turn down the passenger volume if there was no passenger, I never had a problem with the J&M gear.
I tied into my rear speakers for sound, my GPS, my radar detector and my phone. J&M used to make a CFRG module for the GPS, Radar detector, and phone and aux (speaker connection module). The CFRG is no longer listed on the J&M web site nor is the speaker module, but for a while J&M offered a newer phone module.
All J&M stuff was removed before I sold my LT. I left the BMW CB antenna on.
On my FJR today, I use the J&M CB connected to a Garmin 395LM which contains all the MP3's for my tunes, so I get the GPS audio and my tunes. Have not found a decent small AM/FM radio to mix in yet using a mixer. I stopped using radar detectors at least 10 years ago and I definitely don't want phone calls while riding. My wife knows where I am thru my SPOT3 and many areas that I ride thru don't have any cell phone service anyway. To prevent my phone from searching for signals, I always put it in airline mode between stops. This saves my battery power for when I really need it.
I called J&M when the CB2003 came out and asked them why they did not include an AM/FM radio. I could have easily fit into the controls the CB2003 has and is literally a on chip solution.