Bluetooth Pairing Problem - need help

[sjs50613]

My Imagio won't pair with the factory hands-free Bluetooth in my 2010 Nissan Frontier. Everything goes fine until I enter the requested PIN, at which point the Frontier tells me "invalid PIN". I'm entering the correct sequence.

The phone pairs ok with our 2007 Nissan Altima, and paired mostly-ok with my prior 2007 Nissan Sentra, other than the annoying but tolerable delayed hang-up problem that has been documented by others.

Our LG phones pair fine with the Frontier.

HTC tells me it is a Nissan problem. I was able to talk with a Nissan Bluetooth specialist who told me my phone has not yet been tested for compatibility (nor had the LG's that pair ok) and "probably is not compatible". Finger pointing both ways.

The phone pairs ok with the Altima and other hands-free devices.

I think it is related to the Imagio Bluetooth stack implementation coupled with a not-totally-compliant Nissan interface. I suspect that the phone is sending the PIN in some sort of data stream that confuses the Frontier receiver.

Does anyone have any suggestions for diagnosing this or making it work? Is there some sort of packet/frame monitor for Bluetooth available that would let me view the data packets being exchanged?

I'd really like to get this working...

Thanks,
Steve