i have t mobile, if i get the 5.99 t zones plan, what will i still be charged to use access wise, that and i do NOT have t zones atm, but i've been using Wi-Fi to do all my internet stuff, but when i go to phone statistics it says EDGE data received is 230 MB, but i've only used Wi-FI i haven't used EDGE, will tmobile charge me for that? or is it a possibility that that data is from the previous owner of the iphone (its used)