Thanks for posting this solution. I had the same issue and the service writer at my dealer looked at me like I was crazy when I explained it.
I assume the dsp reprogramming will not happen automatically with an Ota update?
This is what happened to me:
22 Platinum powerboost , 2700 miles.
Upon opening the door a loud gunshot noise followed by the sound of breaking glass. Afterwards no sound, volume knob doesn’t do anything. After a few minutes everything started working.
I am planning to rig an easily accessible...