You may be aware that typing a series of specific digits into your Android device will launch hidden menus. You may not, however know all the codes required, since they are not easily remembered.
Fortunately, XDA forum member appelflap has written an Android application that can store these for you and launch the hidden menus from the application.
Phone Codes comes preloaded with some codes that are known to run on most Android devices, however some codes may not work on your device. If this is the case, you have the option to edit the buttons and amend the codes.
You can download the application for free from the application thread, or donate by buying the Phone Code from the Android Market._________