Xbox Game Pass Ultimate
On PC:
Follow the link https://account.microsoft.com/billing/redeem?refd=account.microsoft.com
Enter the 25-character code, select Next, and then follow the prompts:
On Microsoft store on windows:
Press the Start button , and then enter store into the search bar.
Choose Microsoft Store from the results to open the app.
Select your account in the top-right corner of the screen, and then select Redeem code or gift cards.
Enter the 25-character code, select Next, and then follow the prompts.
On Xbox Series X|S and Xbox One:
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.