How to Use a Bluetooth Headset for Metal Gear Solid 4

Power on your PS3 and select "Accessory Settings" from the "Settings" tab in the "Xross Media Bar."

Select the "Manage Bluetooth Devices" and press "X" to confirm that you wish to register a new Bluetooth device.

Put your Bluetooth headset in "pair" mode. This varies for every Bluetooth device, so refer to your headset's manual for the proper process.

Select the option to "Start Scanning" on your PS3 to scan for compatible Bluetooth devices within range. Your PS3 will automatically pick up a signal from your Bluetooth headset.

Enter your Bluetooth device's passkey, if you are prompted to. This will be found in your Bluetooth device's manual.

Press "Circle" to return to the main menu once the syncing process is complete.

Navigate to the "Audio Devices Setting" under the "Accessory Settings" option in the "Settings" tab of the "Xross Media Bar."

Select "Input Device" and select the Bluetooth headset as your microphone. The same device will automatically be changed to the "Output Device" as well so you can hear other players.

Start up "Metal Gear Solid 4" and go to the "Metal Gear Online" section.

Start a multiplayer game. Once you connect to a lobby with other players, you will be able to chat with them through the Bluetooth headset. Use coordinated team tactics while playing to have an advantage over other players.