The iPhone Bluetooth headset is simple in design as well as features. You get the regular abilities to answer and end calls, but don't bet on anything like last-number redial or call mute. You can also switch calls back and forth from the headset to the iPhone and vice versa. Also, we should note that you can indeed use the iPhone Bluetooth headset with other phones, but the pairing process won't be as smooth.
Here's another note: though you won't be able to use the iPhone Bluetooth headset for voice dialing with the iPhone (since the iPhone does not support voice commands), you will be able to use it with other phones that do have voice-command support. We paired the iPhone Bluetooth headset with the RIM BlackBerry Pearl and used it to voice dial flawlessly.
Call quality was surprisingly good. We had heard numerous tales of questionable performance, but our experience told us otherwise. Yes, there is no noise-reduction technology, and voices didn't sound very natural, but we could still carry on a conversation without any noticeable static or hiss. We do have to say that the sound quality does not compare with that of the Plantronics Voyager 520 nor the Aliph Jawbone Bluetooth headset, but by normal standards, the iPhone Bluetooth headset sounded just fine. Just don't expect quality sound in an especially noisy or crowded environment since, as we mentioned, the iPhone Bluetooth headset doesn't have any noise-cancellation technology.
The iPhone Bluetooth headset has a rated battery life of 5 hours and 29 minutes of talk time and 3 days of standby time.