I just signed up for AT&T 3G. Currently I am in a spot where I am on a wifi network yet I see the AT&T symbol showing in the upper left corner of my ipad. Does that mean I am using 3G when I see that displayed? Am I using 3G whenever I set 'Cellular Data' to 'ON' in settings? And while I'm getting my noob questions out.... is the check status capability in settings going to give me current usage stats or is there a delay between what is reported (like is it a day behind)? Thanks!