Originally Posted by bimmerme

That's why you either disable the internet completely (call them and ask them to do that) or you get the $15 unlimited plan.

or install BossPrefs (or similar) and turn off EDGE. The phone works perfectly well as a phone and has network access only when around WiFi networks.

Originally Posted by unclemiltie

or install BossPrefs (or similar) and turn off EDGE. The phone works perfectly well as a phone and has network access only when around WiFi networks.

You quoted my old post from when this was possible.
Unfortunately you can't do that anymore. And even if you could, AT&T will still charge you no matter if you use your EDGE/3G or not. Of course unless you singed up for service before Sept-2009.