To activate Usanetwork/activatenbcu roku device, you can follow these steps: Connect your Roku device to your TV and turn it on. Go to the Roku home screen by pressing the Home button on your Roku remote Navigate to the Roku Channel Store and search for "USA Network" or "NBCU". Select the USA Network/NBCU app from the search results and install it on your Roku device. Once the installation is complete, launch the app and select the "Sign In" option. Follow the on-screen instructions to sign in using your cable or satellite TV provider credentials. After signing in, your USA Network/NBCU account should be activated on your Roku device, and you should be able to access all of the content available on the app.