This device will not work with the iPhone 3G, 3GS or 4.
- Works like a champReview by Robin Elliott
- Works like a Champ with my iPhone 4s. Please note that you do not synch it to the phone via the IOS Bluetooth as that does not find/recognize the device. Instead in your Fitness Program settings there should be a "I have a Bluetooth ANT device setting" that needs to be set to on. As soon as I did that it found the HR Monitor and started collecting data on my workouts. (Posted on 4/3/12)