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 ...

Practically everyone uses a smartphone these days—but did you know that there are some secret codes to unlock information on ...

Coders have a storied tradition of creating back doors in programs (or sometimes just fun little Easter eggs) that can only be accessed with a special "key." This has happened for almost as long as ...