2 reviews now have mentioned different headphones not fitting?
from usa today:
Lots of people (me included) eschew iPod earbuds in favor of their own headphones. Now the bad news: They may not work. Because of how the connector is designed on the Shure headphones I use, I could not fit them into the iPhone headphone jack. Shure is readying a $40 accessory that would let you plug in its headphones and use them for voice. Though iPhone has Bluetooth capabilities for connecting to hands-free headphones, it does not support wireless Bluetooth stereo. I successfully used iPhone with the Jawbone Bluetooth headset from Aliph.
from usa today:
Lots of people (me included) eschew iPod earbuds in favor of their own headphones. Now the bad news: They may not work. Because of how the connector is designed on the Shure headphones I use, I could not fit them into the iPhone headphone jack. Shure is readying a $40 accessory that would let you plug in its headphones and use them for voice. Though iPhone has Bluetooth capabilities for connecting to hands-free headphones, it does not support wireless Bluetooth stereo. I successfully used iPhone with the Jawbone Bluetooth headset from Aliph.