9.3.2012
Two months back, I got the new shiny iPhone 4G and gave my wife my old 3G iPhone, thinking she does not really need the data plan so I will not renew her contract just yet, to save some money. Yesterday I am looking at my phone bill and see that at&t automatically charges me $25 data plan for her plan. What a screw over, at&t! First, you did not even bother letting me know that you are adding service, second you automatically sold me the most expensive one data plan you have! So After calling customer service, I was told that there was a letter send year ago, that "informed" all customers that they cannot have "smart phones" without data plan.
Fortunatelly, I googeled arround and found this tutorial that let's you trick AT&T. This is what you do.
Here is another tutorial how to hack iPhone first generation.
Hope this helped!