I just got a ipad 3g today and updated to 4.2 beta but I can't create a 3G account with AT&T under Cellular Data. There isn't an option for me to "view profile." Is there a fix for this or do I have to downgrade in order to create a 3G account?
I had that same issue and solved it by going to unlockit.co.nz/ and creating a custom profile with my apn settings, I think it may work with at&t too...