Toggle to turn tethering on/off. (Use BT toggle after if you wish to use BT tethering instead of USB).
Note: This is a tethering *toggle* not a full tethering implementation. If you have tethering in your settings menu, this enables / disables it. If not, you need to get tethering working first via a carrier profile. If you have 3.1.2 and AT&T you cant use unsigned profiles so you'll have to find another way to enable it (MyWi app maybe). Once it's enabled, this toggles it.