I thougt that my N900 worked fine with the RNS510 in my VW. My RNS 510 is connected with my N900, but when I want to phone someone the voice of the other person is not on my car speakers. The call stays on my N900 is is not send to my RNS510 system and therefore not on my speakers. I can see on the display in my car, that there is a phonecall, but the caller stays on my N900 and not on the spakers of mycar. Is there a solution for this problem. I installed the apps as described in this thread......?? I've the newest version of premium bluetooth carcit with umts.