An unknown call can be spam, a scam, a wrong number, or something legitimate. The safest default is to let the caller prove it by leaving a voicemail.
Does this affect you?
Use this for iPhone, Android, or any phone receiving repeated calls from numbers not saved in contacts.
What to do when it rings
These habits protect you before you know who is calling.
- Let unknown numbers go to voicemail. Legitimate callers can leave a message.
- Do not press numbers during a robocall, even for remove me options. That can confirm your number is active.
- If you answer and it is spam or a scam, hang up. Do not argue or ask questions.
- Do not return one-ring calls from unknown numbers. Some are designed to make you call premium-rate numbers.
- Check voicemail before calling back. No message usually means there is no reason to return the call.
Reduce calls that get through
Set up filtering once instead of deciding every time.
- On iPhone, open Settings > Phone and enable Silence Unknown Callers. Unknown numbers go to voicemail without ringing.
- On Android, open the Phone app, go to Settings > Caller ID & spam, and turn on spam filtering if available.
- After a call is confirmed spam, open Recents and block or report it.
- Remember that blocking one number only blocks that number. Scammers can spoof or rotate numbers easily.
More control
Local numbers can be spoofed
A call showing your area code is not automatically local or safe. Caller ID can be faked.
Payment threats are scams
Real businesses, banks, and government agencies do not demand immediate payment by gift card or threaten arrest on a random call. Hang up and verify independently.
Expected calls are different
If you are waiting for a delivery, doctor, or business callback, answering may make sense. If the call feels off, hang up and call the organization using an official number.
Sources
- Federal Communications Commission – Robocalls (2025)
- Federal Trade Commission – Phone scams (2025)
- Apple Support – Silence unknown callers on iPhone (2025)