IMPORTANT NOTE: 


You must be 13+.
NO EXPIRATION DATE OR SERVICE FEES 


To check on your Microsoft billing information, login to your Live account and visit link below:

https://commerce.microsoft.com/PaymentHub/Profile



How to redeem a code on Xbox One

  1. Sign in to your Xbox One (make sure you’re signed in with the Microsoft account you want to redeem the code with).
  2. Press the Xbox button  to open the guide, then select Home.
  3. Scroll right and choose the Store tab.
  4. Choose Use a code.
  5. Enter the 25-character code, then follow the prompts. Don’t worry about hyphens, the system takes care of those for you.


How to redeem a prepaid code in the Xbox App on Windows 10

  1. From a web browser, go to Xbox.com, select Sign in, enter your Microsoft account, then follow the prompts. (Make sure you’re signed in with the Microsoft account you want to redeem the code with.)
  2. Select your profile (where Sign in used to appear), then choose Redeem code.
  3. Enter the 25-character code, then follow the prompts. Don’t worry about hyphens, the system takes care of those for you.


How to redeem a code on Windows 10

  1. Sign in to your PC (make sure you’re signed in with the Microsoft account you want to redeem the code with).
  2. Press the Start button, type store, then select Microsoft Store.
  3. Select More … > Redeem a code.
  4. Enter the 25-character code, then follow the prompts. Don’t worry about hyphens, the system takes care of those for you.


How to redeem a code on an iOS, Android, or Windows 10 mobile device

  1. Open the Xbox app, then sign in (make sure you’re signed in with the Microsoft account you want to redeem the code with).
  2. Press the Menu button in the upper left corner.
  3. Select Microsoft Store from this list, then choose Redeem a code.
  4. Enter the 25-character code, then follow the prompts. Don’t worry about hyphens, the system takes care of those for you.


How to redeem a code on Xbox 360

  1. Sign in to your Xbox 360 (make sure you’re signed in with the Microsoft account you want to redeem the code with).
  2. Press the Xbox Guide button on your controller.
  3. Select Games & Apps, then choose Redeem Code.
  4. Enter the 25-character code, then follow the prompts. Don’t worry about hyphens, the system takes care of those for you.

 


Reference: https://support.xbox.com/en-GB/billing/prepaid-codes/redeem-prepaid-codes