tethering for iphone 3G and iphone 3GS

Alright guys this is super easy and i got this from tys iphone help so just go to tytube.net/att/ on your phones browser. then click update carrier and then install.  now you have internet tethering so go to settings/general/network/ then turn internet tethering on.  i can't guarantee that this will remain free forever but i can't see how at&t can charge you. 

(if you don't know what internet tethering is, it means you can take your phones 3G or Edge connection and use it on a computer.)