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

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.

When you're boarding a plane or going somewhere where your phone's wireless signals need to be completely disabled, there's a single toggle to make this faster and easier — airplane mode. It turns off ...