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.

To enable call waiting on an iPhone, go to Settings > Phone > Call Waiting and toggle the switch on. On an Android phone, you typically open the Phone app, then go to Settings > Calls > Supplementary ...

Have a Motorola phone? Want to make it more secure? This secret PIN Scramble feature lets you do precisely that.

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