Disable external mic.
Yesterday I got an iPhone 3G, I'm really pleased with it so far, and I've only come across this one problem.
I want to use my iPhone instead of my iPod when I'm driving, so I've connected it to my car's AUX port with a standard jack to jack. I was also planning to use this as hands free, and the caller would be heard from the cars speakers, and I would use the iPhones built in mic. The sound output side works great but when I start the engine the iPhones mic cuts out, so I'm assuming that the iPhone thinks I've connected an external mic, which I havn't. Is there anyway I can stop the iPhone from trying to use an external mic, and just use external speakers?
iMac, Mac OS X (10.5.6)