I have a pair of Shure headphones that I use with my iPhone and I'm wondering if the following is normal behavior. When receiving a call, the music fades out as normal and I hit answer on the iPhone. With the Apple headphones, the sound goes to the headphones and voice is picked up via the mic on the headphones, as expected. However, the Shure headphones obviously don't have a microphone on them, so I had assumed that when I got a call the sound would still come through the headphones and the built in microphone on the actual iPhone would be used, but every time I've gotten a call I've had to unplug the headphones before anyone could hear me. Is this normal, or am I just doing something wrong?