as with most all forums and websites, trad gang works with "session cookies".
when you login, our software knows it's you by sending you, and checking for, a unique session cookie - a tiny bit of unique data stored on your device (desktop, laptop, iphone, ipad, smartphone, tablet, etc).
as long as yer logged in to trad gang, the session cookie remains on your device to validate that you is you and not me or someone else.
when you logoff trad gang, or close your browser, the session cookie is deleted ... and logging back into trad gang starts the process all over again.
without that session cookie, you can't use trad gang.
why the at&t wireless network is not allowing session cookies for trad gang is the question that hasn't been answered so far.