1) After downloading, open HBO GO on Roku
2) Select Activate Your Device and get the activation code to be entered on your computer.
3) Go to hbogo.com/activate on your computer, choose Roku and continue.
4) Select your TV provider and enter your username and password.
5) Then, enter the activation code appeared on your device(From Step 2).
6) That’s it. Click on Activate Device and you will see success message on your computer as well as device.