ZDNET's key takeaways Use these codes to forward calls, pay your bill, check balances, etc.Some of the codes work only 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 ...

Here's something you might not have known: If you type a specific set of numbers and characters into your Android phone's dialer, you'll reveal a "hidden" set of diagnostics and phone information.