Bluetooth Devices
You can use Bluetooth devices with iPhone, including headsets, car kits, stereo headphones, or an Apple Wireless Keyboard. For supported Bluetooth profiles, see support.apple.com/kb/HT3647.
Note: The use of certain accessories with iPhone may affect wireless performance. Not all iPod and iPad accessories are fully compatible with iPhone. Turning on airplane mode may eliminate audio interference between iPhone and an accessory. Reorienting or relocating iPhone and the connected accessory may improve wireless performance.
Turn Bluetooth on. Go to Settings > Bluetooth.
Connect to a Bluetooth device. Tap the device in the Devices list, then follow the onscreen instructions to connect to it. See the documentation that came with the device for information about Bluetooth pairing.
iPhone must be within about 30 feet (10 meters) of the Bluetooth device.
Return audio output to iPhone. Turn off or
unpair the device, turn off Bluetooth in Settings > Bluetooth,
or use AirPlay 
to switch
audio output to iPhone. See AirPlay on page 33. Audio output
returns to iPhone whenever the Bluetooth device is out of
range.
Bypass your Bluetooth device. To use the iPhone receiver or speaker for phone calls:
- Answer a call by tapping the iPhone screen.
- During a call, tap Audio and choose iPhone or Speaker Phone.
- Turn off the Bluetooth device, unpair it, or move out of range.
- Turn off Bluetooth in Settings > Bluetooth.
Unpair a device. In Settings > Bluetooth, tap next to the device, then tap "Forget this Device."
If you don't see the Devices list, make sure Bluetooth is on.