Join Date: 8th June 2010
Thanked 16 Times in 15 Posts
I think that's a phone-dependent setting and I haven't quite figured it out myself.
If I dial using my Parrot's (mki9200) voice control, it always connects via the Parrot's microphone and speakers. However, if I dial a number using the iPhone interface, it sometimes uses the Parrot microphone/speakers and sometimes uses the iPhone's. It's quirky behaviour but it's easily avoided by me - as long as I always the Parrot to dial.
When you're in a call, there's an "Audio Source" option on the iPhone to switch between the Normal Phone / Loud Speaker / Parrot.