I love my iPhone, but it's not the easiest to hold when you're on a long business call. To save my co-workers (from me having to talk loud) and my hand (from holding the iPhone near my ear for 45+ minutes at a time), I bought a YUBZ Retro Bluetooth handset - it's perfect.

The YUBZ also has a lot of new modern features like: a mute switch for the ring tone, 5 hours talk-time, 160 hours standby, last number redial, voice dialing, volume control and it uses Bluetooth version 2.0. Now, my iPhone is perfect! :-)