Does anyone know if earphones that come with a mic is compatible with iPhone 3G? I did a quick search and some people said that the earphone will work, but there will be no mic/volume control options if connected to an iPhone 3G. I don't really care about the volume control, but sometimes it's convenient to have a mic to talk on the phone while driving. I'm not too strict on the quality of sound either, so nothing expensive. Can anyone give me some suggestions? Thanks.