DCSwitch

DCSwitch is a small tool that with one movement, allows you to disconnect your 3G data. Therefore you can be assured that at any time you will not spend more than you should.

The app includes a widget that you can pin to your desktop, and thanks to it, you can turn off your data.

DCSwitch is one of those small and almost insignificant apps that you practically do not pay attention to, but it's important and useful.