To redeem CoD Mobile codes, head to the dedicated redemption center. Here’s a step-by-step guide on how to do it:

1. Get your UID code by launching CoD Mobile, clicking on the top left profile icon.
2. You will find the UID under the Basic tab.
3. Open the CoD Mobile Redemption Center in your browser.
4. Put in your UID and an active redeem code from the list above.
5. Fill in the CAPTCHA and hit submit.

You will instantly receive your rewards in your in-game mail and you can get them by opening the message and hitting claim.