The main functionality of having secret codes hidden within a mobile device was originally intended for the employees of the respective devices to trouble shoot and perform procedures. Yet now, living in a digital world, everyone has access to this information.



The most common Android codes that I could find are:

Factory Reset

Open your dialer and type in the following *#*#7780#*#*. Another way is to open up settings and click on Restore > Factory Reset.

Reinstall Firmware

You can reinstall your device’s firmware with ease by typing in *2767*38...