My Bluetooth connection between my Sprint HTC Hero and my 2009 Mercedes C300 worked flawlessly for 7 months. Last week, Sprint upgraded my phone to Android 2.1 and I have not been able to hold a connection since. I believe that something is flawed or missing in the BT 2.1 component of this ROM upgrade. They pair but go into a patterned connect/disconnect every 30 seconds. Sprint and HTC are stumped so far. Is there a way to replace JUST the BT portion with the previous version?