By entering certain strings of numbers and symbols into your phone's dialer, you can gain access to a world of hidden ...

Some codes are specific to certain models, but other, more generic codes can be accessed on nearly any Android device. SOPA Images/LightRocket via Gett You might not know this, but your Android device ...

You could access numerous useful iPhone features by typing in a few secret codes on your device. Lots of the codes work whether you have an old or new iPhone and they can let you do things like ...