If your LR3 is equipped with the bluetooth hands free system, all you need to do is to enable bluetooth on your mobile phone, you should see LandRover show up in the bluetooth discovery list. Depending on your model of phone, you should be able to tell your phone to 'pair' up with the LR3. The phone should prompt you to enter a pairing pin, the pin by default is 2121. Once you get the phone paird, you should be able to use the hands free features. I have my iphone paired with my 06 LR3 and it works pretty well.
just my two cents..