3G Data Switch

3G Data Switch is not so much an app as a small widget that you can install on your Android. In fact, 3G Data Switch doesn't have any kind of interface whatsoever. Instead, once installed, you can select it from a list of widgets. Now, it's important to remember that this widget ONLY works with Android versions previous to 2.2. In short, this app is only somewhat useful if you have an old Android device that works with an older software version of Android.

3G Data Switch is a very lightweight app, since it's technically a widget. In fact, it takes up barely 500 kb of space once installed.