Posted 4/23/2011 15:42 (#1740744 - in reply to #1738476) Subject: RE: AG3000 MODEM
Do a Google search for "AT&T APN settings", with a bit of looking around this should tell you what you need to put into the AG3000 as for Access point, password and username.
I don't think the AG3000 is locked to any network or data plan, they certainly aren't here in the UK.