Once the code is successfully redeemed, you can download the Tandem app from the App Store or the Play Store and log in using your credentials.
You will then complete the onboarding process. After finishing onboarding, you will immediately get:
Access to DeutschConnect Parties
Full access to Tandem Pro for three months
If you already have a Tandem account, you can simply go back to the app after redeeming the code and enjoy the benefits.