It works on my PC and it still works perfectly on my old EVO 4G. I also have U-verse. When I try to use it on my 3D it will not allow me to log in and says U-verse is not participating. If that is true why does it work on my old phone still?
Search the web for the original version of HBOGO, download it and save it to your memory card. Once you do that, open the app, sign in. You can just use the old version and you will be fine. If you want you can download the latest version on top of it. If you ever cant log in because it says ATT uverse is not supported, you will have to remove the latest version, reload the original, and log in with the original. Thats what I do now.
There is a problem with the newer version of HBO go.