When on the Home screen, go to the Store selection;
• Find Categories selection, choose Games option;
• Choose the Use a Code feature (or shout out at your controller – Xbox, use code!);
• Sign in if prompted;
• Your prepaid key will either come in the form of a QR code, or the 25-character code;
• In the case of QR code hold it to your Kinect sensor. In the case of the 25-character code, simply enter it by hand.
If you want to activate your Microsoft Ultimate 2 months trial via Web Browser:
• While in a browser, select the Redeem code feature;
• Click on Sign In option;
• Log into your Microsoft account;
• Click on Redeem option;
• Enter the 25-character code and click Confirm;
• Enjoy your purchase!