Picking up the phone is not a data breach. A voice call carries sound, not access to your device. The idea that a scammer can drain your phone just because you answered is one of the most persistent myths about scam calls, and it distracts from the real danger: being talked into handing information over.

How phone scammers actually get information

Almost every phone scam relies on persuasion rather than technology. The caller creates a reason - a fraud alert, a tax problem, a parcel, a problem with your broadband - and then asks you to do something:

  • Confirm details such as your name, date of birth, address or the last digits of your card.
  • Read out a one-time passcode that your bank or an app just texted you.
  • Install an app that gives them remote control of your phone or computer.
  • Open a link they text you during or after the call.
  • Move money to a "safe account".

Each of those steps needs you to act. That's good news, because it means you can stop the scam at any point simply by ending the call.

What about hacking by phone call?

Highly targeted spyware attacks that exploit phone software do exist, but they are expensive and aimed at people like journalists and officials, not at random numbers from a spam list. For ordinary users, keeping your phone updated covers that risk. A missed call or a call you answered is not a sign your phone has been compromised.

The details you already give away by answering

Answering does confirm a couple of small things: that your number is active and, if you speak, that a person uses it. That can mean more spam calls. It doesn't give the caller your name, your location or any account.

Never do these on an unexpected call

  1. Read out a code sent to you by text.
  2. Give your PIN, password or full card number.
  3. Install an app or let someone "connect" to your device.
  4. Transfer money because someone says your account is at risk.
  5. Stay on the line when you're told not to tell anyone.

If you already did one of these, act quickly: contact your bank on 159 or the number on your card, change the relevant passwords and report it as fraud. Our step-by-step answer for that situation is what to do if you accidentally answered a spam call. And if the caller claimed to be your bank with a real-looking number, our guide to caller ID spoofing explains why the number proves nothing.