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

On iPhone, to change the forwarding number, go to Settings > Phone > Call Forwarding. On Android, the steps vary, but generally you'll open the Phone app, tap the three-dot menu, go to Settings > ...

Android smartphones harbor numerous hidden capabilities that are accessible through secret codes. These developer tools, often unknown to regular users, ...