last month, I got over 7 from wap.cingular. it is so expensive. my phone is iphone 3g, but I brought it from my country. now, I do not know whether can use internet or not. because iphone can connect wirless, right? so I can connect wirless at home. in fact, when I go somewhere, if there is no wirless, I also cannot use. (why I will be charge) do you guys know what happened on wap.cingular. when I check my bill, sometimes when I used internet at home, it did not charge. however, sometimes I did not use my phone, they charge me from this instead. please help me.... I am international student. could i just close all of interenet service so that I can use my phone. or I just use wirless at home........