Anderson Vulczak and BigBoss constructed the toggle which sets a bogus IP address, (18.104.22.168) to your data adapters IP address. This seems to kill EDGE / 3G without any battery drain issues reported in using other methods such as entering a bad APN.
You may want to do this to ensure your iPhone does not rack up costly data usage chargers from your carrier.
Press to launch Cydia from your iPhone Springboard.
Select Sections from the tabs at the bottom of the screen.
Select SBSettings Addons from the list of Sections
Choose Data Toggle from the list of Packages.
Press the Install button at the top right of the screen.
Press the Confirm button to begin installation.
Once installation has completed successfully press the large Restart Springboard button.
Swipe your finger across the status bar to pull up the SBSettings menu.
Press the Data toggle to deactivate data.
You will notice the icon goes red and your IP Address changes to 22.214.171.124.
Edge and 3G data access on your device is now blocked.