samsung galaxy sIII unlocked at&t apn settings?

[silverchick082]

I have a Sumsung Galaxy S III unlocked AT&T phone that I just switched to ST last night. The email they sent me to set up the new apn is not working. I have seen a lot of post about it but have also been seeing that they have switched to new settings recently and have not updated the information on the ST site. Can anyone please help me with the settings so I can switch my phone? I also am trying to switch a HTC Vivid as well.