You must pair your phone with another device before you connect to it.
From the Home screen, tap the Menu key > Settings > Bluetooth.
Tap the Bluetooth switch to turn it on.
Tap the check box next to your phone's name to make your phone visible to other Bluetooth devices.
A list of available devices will be displayed. Tap the device you want to pair with from the list.
Depending on the type of device, you may have to enter matching codes, confirm matching codes, or the devices may automatically pair.
Once pairing is successful, your phone will connect to the other device.
Some devices, especially headsets or hands-free car kits, may have a fixed Bluetooth PIN, such as 0000. If the other device has a PIN, you will be asked to enter it.