APN OnOff Widget is a beautifully designed and easy-to-use widget. It allows you quickly enable or disable your 3G/EDGE/GPRS with only ONE click and lets you know the current connection status in a straight view.
APP size, only 35 KB.
Public source code: http://www.maicas.net/android/apnoo.htm
This program only changes the configuration of the APN.
In many phones, this is enough to disable the connection.
But that is not enough in some mobile.
In this case, there is nothing I can do, sorry.