Hey, I am currently overseas in Vietnam and brought my iphone over with me so I could make calls back home. Anyways when I got the sim and had it loaded up with minutes I noticed that the last input code was *100*33691073155280# and call. Wtheck is that? When I try to use it some Viet words pop up thanking me for the using their service.... Can any one with AT&T try it out on their phone and tell me what it says? Thanks.