Have just had to upgrade phone to HTC one M9. Chose phone because M8 had native rSAP stack and thought it might work. VW premium phone interface dates from 2007 and is installed in a Bentley. Phone connects and asks for permission to share SIM with car. Phone shows internal aerial off and an rSAP status on the top line. however next stage should be a message from the car saying phone book being loaded. I only have one number on the SIM as a trial but nothing happens. Car armrest blue tooth display shows status as connected but the central screen never shows phone available nor does the driver screen. On leaving the car normal SIM use returns to the phone.
Wondering if I should root the phone and try rSAP App so that if it too fails at least I could get a trace. Anyone with any ideas?