To Twitch TV activate on your device, you must first create a Twitch account. You can do this by going to the Twitch website and clicking on the “Sign Up” button in the top-right corner of the screen. Once you have created an account, you can then activate it on your devices.
To activate on mobile devices, open the Twitch app and log in using your account credentials. Tap on the three lines in the top left corner of the app, and select “Settings” from the menu. Scroll down and tap on the “Twitch TV” option,
