The secret codes of android brings about functionalities and menus unknown to the common user which review and makes use of hidden codes which work on almost all devices. These codes should be used with caution. Some can make your phone lose data or render it unusable. There's a lot of incomprehensible tech jargon which pops up in the menus after entering some of these codes which means that if you aren't 100 percent sure what you're doing don't do it.