I'm a new customer and what if 4GB of data is not enough? Is there anyway to get any sort of unlimited smartphone plan from AT&T? I'm not necessarily looking for the old $30/mo unlimited plan that they axed last year. But has anyone had any luck in calling AT&T up and having them switch you from the 2GB plan to the unlimited plan? Switching to Sprint is not an option as I don't want slow CDMA unlimited data. I want unlimited HSPA+ data. Thanks