Did you know that punching select numbers on your cellphone can give you access to hidden features? If not, you’re not alone. Sometimes referred to as “secret codes,” these numbers are actually ...

To use Android secret codes, open the Phone app, go to the dial pad, and enter a code. You don't need to tap Call. If your ...

In this April 1, 2020, photo, a passenger holds up a green pass on their phone on a subway train in Wuhan in central China's Hubei province. Green is the "health code" that says a user is symptom-free ...