I have a att htc one phone and its been blacklisted is there anyway around that for I topic

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[Q] app work around topic

ok, so long story short, i got handed one of these wonderful little balls by a friend of mine, i cannot get the app to sign in and have not signed in on a different device, dose ANYONE know how to set up this damn app or do i have a 1/2 metal, 1/2 plastic paperweight?

PLEASE HELP!!! lol i appreciate anything you can give me