HOW TO REDEEM
Go to http://www.origin.com/uk/about
Click on the orange 'Download Origin' button
Click 'Run' to download and install the Origin client (45.9 MB)
Once the installer has finished, open the Origin client (icon should show on your desktop if you selected this option in the install process) and login with your Email or Origin ID (if you don't have an Origin account, click on 'Create an account' and enter your details)
Once you are logged in, click on the 'Customize and Control Origin' button and select 'Redeem Product Code'
Enter your Origin code and follow the on screen instructions
Enjoy playing your free copy of Battlefield 3!