Guys,
I heard that if you have HBO Now/HBO GO, that HBO Max is going to be offered through an automatic update on your mobile device. (Everything on HBO Now/HBO GO is already on HBO Max) HBO Max has so much more content.
But some have suggested to manually remove the HBO Now and HBO Go apps if you have them, and than install HBO Max on your device. They said that if you don't, you might have trouble installing and activating HBO Max.
Satch