If you already have the account created, you should be able to just log in to the app on your phone (no need to enter name, zip, etc), there is a log in option.
If you haven't, try creating the account on your apple tv, and then just use that account to login on your phone.
I've tried all that. I can't get passed the loop. When I called HBO about it, I was told I was one of many, and to just wait it out.
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I've tried all that. I can't get passed the loop. When I called HBO about it, I was told I was one of many, and to just wait it out.
On a whim, I tried it again. Suddenly, no loop, and everything works. Weird, but cool. Of course I did just upgrade to 8.3.