If you answer a call from an unknown number, hang up immediately. If you answer the phone and the caller or recording asks you to select a button or number to stop receiving the calls, you should just hang up. Scammers often use this trick to identify potential targets.

Are unknown callers dangerous?

Answering even one question from someone with no caller identity can be dangerous. It puts you at risk of being a victim of voice phishing. This kind of scam is perpetrated when the person on the other line records your voice whenever you answer “yes” to their question.

Is it safe to call back an unknown number?

While there are methods you can try, calling an unknown number back is not always possible. When possible, it is not always advisable. Exercise caution when returning calls from numbers you don't know. Only call back if you have good reason to believe that the number that called you belongs to someone you know.