This is a 4G toggle for AT&T android phones. This will automatically download an application made with Google's App Inventor, which cannot not be uploaded to the Market at this time due to insufficient dependencies on Google's end. Make sure to have Unknown Sources allowed. Go to Settings > Applications > Turn on Unknown Sources. When this downloads, open your browser's downloads and tap the newest download, (Toggle.apk), and click install from the Package Installer. When it installs, open it up and follow the directions inside the application. Unfortunately, you can only go to EDGE, not to 3G with this method. This application opens up an already installed application on your phone that allows these settings. This application is hidden and can only be opened by dialing a number. 4G Toggle will automatically dial that number, making it easier for users to access it.
Devices this has been tested and works on:
HTC Inspire 4G - Android 2.2 Froyo / HTC Sense 2.0
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