Things You'll Need
Instructions
Turn on your Microsoft Xbox 360 and log into your Gamertag account.
Navigate to your profile on the "My Xbox" area of the Xbox 360 dashboard and press "A."
Select "Manage Account" by pressing "A."
Select "Memberships" by pressing "A."
Select the first option, which will be your current Xbox Live Gold status, on the Memberships screen by pressing the "A" button.
Select "Redeem Code" by pressing "A."
Enter your Xbox Live Gold prepaid subscription code and confirm the code to activate it. An Xbox Live subscription card can be purchased from online retailers (see Additional Resources).