How can I unpair / remove a Bluetooth device from my iPhone?
To stop using a Bluetooth device with the iPhone, or to use a different Bluetooth device, you must unpair the iPhone from the current Bluetooth device.
To unpair or remove a Bluetooth device from the iPhone:
1. Choose Settings -> General -> Bluetooth -> ON
2. Select the device and touch Unpair.
Your iPhone is now free to be paired with a different device.