Is It Safe to Answer Calls from Unknown Numbers?
Usually it's best not to. Answering an unknown call rarely harms you instantly, but it can confirm your number is active and open the door to scam tactics. Here's the honest risk — and a safer habit.
The real risks
You confirm your number is "live"
Spam operations dial huge lists. Picking up — even saying "hello" — flags your number as active and responsive, which leads to more calls and gets your number sold on.
Scam pressure and social engineering
Scammers impersonate banks, delivery, government or tech support and use urgency ("your account is blocked", "press 1 now") to rush you into sharing OTPs, passwords or payments.
Voice recordings and AI cloning
Some scams try to capture your voice (the classic "can you hear me?" prompting a "yes") or collect enough audio to attempt AI voice cloning. Don't engage or confirm with a clear "yes".
When an unknown call might be genuine
Plenty of real calls come from numbers you haven't saved — a clinic, a delivery driver, a new employer, a callback you requested. The safe move isn't to answer everything; it's to let those reach you in a controlled way. A real caller almost always leaves a voicemail or follows up by text, after which you can save them to contacts.
A safer habit: screen, don't gamble
Instead of deciding call-by-call, set a rule: numbers in your contacts ring through; everything else is screened. On Android, a call-screening app can block or silence non-contacts automatically and keep them in your log to review — so you never miss something important and never have to risk answering spam.
- Don't share codes or payments on an inbound call you didn't initiate. Hang up and call the official number.
- Don't say "yes" or press keys for robocalls.
- Let it go to voicemail if unsure — real callers leave a message.
Free · No sign-up · No contacts access
Related: what happens if you call back a spam number · how scammers get your number
Frequently asked questions
Is it safe to answer calls from unknown numbers?
It's generally safer not to. Answering can confirm your number is active and expose you to scam pressure tactics. Let unknown calls be screened or go to voicemail; genuine callers leave a message.
Can answering a call get me hacked?
Simply answering won't install anything on your phone, but it can lead to social-engineering scams and confirms your number is live. The danger is what you're persuaded to say or do on the call.
What is the "can you hear me?" scam?
A call designed to get you to say "yes," which scammers may record and misuse. Don't answer questions from unknown callers — hang up if unsure.
Should I block or just silence unknown callers?
Block if you want them rejected outright; silence if you'd rather review them later in your call log. Either way, contacts still ring normally.
How do I stop unknown calls entirely?
Use a call-screening app to block or silence every number not in your contacts, with an allow list for exceptions.