Then sign in using your provider's credentials. hbomax/tvsignin – Visit the authority web-based interface and enter 8 digit activation code to activate hbogo or hbomax on your devcie. USer are free to activate hbomax on the following gadgets like smart television, Apple TV, roku, playstation, xbox and other streaming media players. At the point when you sign in to hbomax application on smart tv or other gadget, your gadget shows 8 digit code. This is the hbomax/tvsignin which is utilized to sign in hbomax.