You can use your smartphone to visit the web: activate.apple.com, and then enter the code provided from your TV.
When setting up a new Apple device, such as an iPhone, iPad, or Mac, users may be prompted to visit activate.apple.com to complete the activation process.
The activate.apple.com web portal has been used for device activation and registration processes.
At activate.apple.com this website, you typically enter your device's unique identification information and link it to your Apple ID or iCloud account.