Activate the HBO Max App on Xfinity Flex or X1 - Xfinity ...
To begin the sign in process, launch the HBO Max app and click SIGN IN. A unique activation code will display on screen. Go to hbomax.com/tvsignin on your phone or computer to enter this code. Note: You’ll have 15 minutes to enter the code, after which time you’ll need to enter a new one.
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