How to activate an Apple iCloud key?

Redeeming an Apple iCloud key is really simple, just follow these steps:

1. On your Mac or iPhone, open the App Store.
2. Click your name or the sign-in button in the sidebar.
3. Click Redeem Gift Card.

The key is not working

If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions:  

• My key is Duplicated / Already used
• My key is Invalid
• My key is region locked / can't be activated in my country
• My key activated a different product
• My key did not activate all of the content