Use Amzon.com/redeem to add your gift card to your Amazon Wallet .
From amazon.com/redeem you can connect your Vizio Smart TV to the Internet, apps, and services like Google Assistant.
Enter the code and login to Amzon.com/code site to watch Prime Video on the device .
To activate and use the Amazon card , go to amazon.com/redeem as the balance is added from amazon.com/redeem .