How to activate a KartRider: Drift key?

Redeeming a KartRider: Drift key is really simple, just follow these steps: 

1. Launch the game from Xbox, Playstation, Steam, Android, or iOS.
2. Open the game menu and go to Settings.
3. Go to the "Account" tab. 
4. Click on "Apply Coupon" and enter your key.

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