Hey there,
The round button on my AVIC F910BT has a small speaking figure and telephone icon on top.
The manual says that it can be used to end active phone calls, and forums (this one too) say that it can be used for voice dialing phone numbers/contacts.
In my case that button doesn't do much. The only thing it does is mute the audio when long pressed.
In other words: I can't end phonecalls which is quite frustrating when I run into someone's voicemail.
I have tried pulling that button up, pressing it, it just won't work.
The phone I'm using is an HTC HD2 and the firmware of the Bluetooth carkit is the latest 3.30.
And what about that voice activation/dialing?
Any help would be MUCH appreciated!!!