Easiest way to explain your plan is this, the att go -phone plan is a national network plan, what that means is if you are on a "former att tower" then you will use your minutes at whatever price plan you have, if you phone is off network,then you are charged off network roam fees, which for go-phones is $0.25 a minute.

If someone tell you there is no roam fees, then they are talking the new "orange" go phone plans, but blue(formerly attws) does get off network fees, and you cannot go what your display since all towers will say cingular, but you can still be off nrtwork, as a rep i can tell you first hand.