
You only need to enter the PIN the first time you pair your computer with your iPhone. The PIN appears when you make your computer discoverable as a Bluetooth device.

If your computer gave you a PIN, enter it now. Touch the listing for your computer when it appears. Tap "Settings" on your iPhone, and then touch "Bluetooth" to have your iPhone search for available devices to pair with. On a Windows 8.1 computer, press "Windows-C" to open the Charms bar, click "Settings," choose "PC Settings," go to the "PC and Devices" section, and then select "Activate Bluetooth."

Make sure that your iPhone is turned on, and then press "Windows-C" on your Windows 8 computer to open the Charms bar, click "Settings," select "Change PC Settings," click "Wireless," and then, under Wireless Devices, turn Bluetooth on.
