The device you need to activate should display an activation code. Use the email address and password associated with your Netflix account. You can use any web browser on PC or Mac. How do you add a device to your Netflix account? Select Service Code from the bottom of the page. Within the Netflix website, go to your Account. Enter the activation code displayed on your TV in the box. Sign into your Netflix account if necessary. Using the address bar, navigate to /activate. Launch a web browser on any device that you can browse from - like your smartphone, tablet, or PC.