Beginning today, November 21, and continuing through Sunday, November 25, HBO and Cinemax premium networks will be offering a free preview to all Xfinity customers across Xfinity Stream app or web portal On Demand.
Please note that the free preview is available to all Xfinity customers, including non-Xfinity TV subscribers. Non-Xfinity TV customers can watch all the networks available OnDemand content through the Xfinity Stream app and online portal using their Xfinity username and password.
Press the "XFINITY" button then select "ON DEMAND" then select "HBO FREE PREVIEW".
You can also access it with the Xfinity Streaming App on your computer.