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 ...

Everyone uses a smartphone these days but not everybody knows that a number of secret codes exist that can help unlock information on your phone that might come in handy one day. All you need to do is ...

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 ...