"How to redeem a code on Xbox console;

Press the Xbox button to open the guide, and then select Store.
Press the View button to open the side menu, and then select Redeem.
Enter the 25-character code, select Next, and then follow the prompts.

How to redeem a code from a PC or mobile browser; 

From a web browser, go to redeem.microsoft.com.
Enter the 25-character code, select Next, and then follow the prompts."

Buy Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

Buy Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (XBOX One - Cheapest Store)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games US)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Game EU)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

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Recharge Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK) - Online

Buy Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (XBOX One - Cheapest Store)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games US)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Game EU)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

Comments about Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK)

Recharge Call of Duty: Modern Warfare II - Cross-Gen Bundle (Xbox Games UK) - Online

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