Why You Should Stay Silent for Three Seconds When Answering Unknown Calls

As artificial intelligence technology advances, telephone scams are becoming increasingly sophisticated. Chinese police have recently reminded the public to be cautious when answering unfamiliar calls, particularly when the caller remains silent after the connection is established. One recommended precaution is the “three-second silence rule”: wait briefly before speaking, and hang up if the caller continues to remain silent or the call appears suspicious.

The advice has attracted attention following reports about AI-powered voice cloning scams. Guo Tao, an officer with the news center of the Beijing Municipal Public Security Bureau, has recommended that people avoid speaking immediately when an unfamiliar caller does not respond. Criminals may attempt to obtain voice samples and use AI tools to imitate a victim’s voice, potentially impersonating that person when contacting family members, friends or colleagues to request money.

Why Stay Silent for Three Seconds?

When answering an unfamiliar call, many people instinctively say “Hello” or ask who is calling. In some suspicious calling scenarios, however, the caller may deliberately remain silent, waiting for the recipient to speak first.

If criminals obtain voice recordings, they may use AI voice-generation tools to create audio that resembles the original speaker. The synthetic voice could then be used in fraudulent calls or voice messages designed to persuade others that they are communicating with someone they know.

For example, a scammer might impersonate a family member and claim to have been involved in an accident, encountered an emergency or urgently needed financial assistance. The victim may then be pressured to transfer money before having time to verify the story.

The three-second rule is intended to encourage people to pause rather than respond automatically. If an unfamiliar call remains silent or displays other suspicious behavior, hanging up can prevent further engagement with a potentially fraudulent caller. Police warnings have highlighted this precaution as one way to reduce exposure to suspected AI-enabled scams.

However, three seconds of silence is not definitive evidence of fraud. Legitimate calls can also experience delays because of network problems, technical glitches or a caller’s temporary inability to respond. The rule is a simple precaution, not a guarantee that a call is dangerous or that speaking would automatically expose someone to fraud.

Common Forms of AI Voice-Cloning Scams

AI voice-cloning technology can be misused in several types of fraud. Criminals may draw on publicly available audio and video, social media content or other recordings to create synthetic voices that resemble real people.

1. Impersonating family members or friends

A scammer may imitate the voice of a child, spouse or friend and claim to need money urgently. The story might involve a medical emergency, an accident or an unexpected financial problem. The victim may be urged to transfer funds immediately without contacting the supposed caller through another channel.

2. Pretending to be a manager or colleague

Fraudsters may impersonate a company executive or business associate and request an urgent payment, supplier transfer or confidential transaction. Employees who rely solely on a familiar-sounding voice may be more vulnerable to this type of deception.

3. Posing as customer-service representatives

Scammers may claim to represent a bank, online marketplace or delivery company. They might allege that an account has a problem, a refund is pending or a subscription needs to be canceled. Victims may then be directed to disclose sensitive information, click suspicious links or make payments.

4. Combining synthetic voices with fake videos

In some cases, criminals may combine AI-generated speech with manipulated images or video to make an impersonation appear more convincing. Police anti-fraud warnings have highlighted the risks posed by AI-generated voices, fabricated videos and other deceptive digital content.

How to Protect Yourself When Answering Unknown Calls

The three-second pause can be useful, but it should be part of a broader approach to telephone safety.

First, do not rush to respond to suspicious silence.If an unfamiliar caller remains silent after the connection is established, wait briefly. If the silence continues or the call appears abnormal, hang up rather than attempting to engage the caller.

Second, never disclose sensitive information to an unverified caller.Avoid sharing identification numbers, bank details, passwords or one-time verification codes. Be particularly cautious if someone asks you to install unfamiliar software, enable screen sharing or follow instructions involving your bank account.

Third, independently verify requests involving money.Even if a caller sounds exactly like a relative, friend or manager, voice similarity alone does not establish identity. If someone requests an urgent transfer, end the call and contact that person using a phone number you already have saved. Where appropriate, use another trusted communication channel to confirm the request.

Fourth, be skeptical of investment offers promising guaranteed profits.Unknown callers may use claims of exclusive opportunities, insider information or unusually high returns to pressure people into depositing money. Do not make financial decisions simply because a caller insists that an offer is urgent.

Fifth, act quickly if you suspect fraud.Stop any payment or other requested action, preserve call records, messages and transaction receipts, and contact the relevant authorities or financial institution. People in mainland China can call 110 in an emergency or contact 96110 for assistance related to telecom and online fraud prevention.

Three Seconds Are Only the First Line of Defense

As AI tools become more widely available, recognizing a person by voice alone is becoming less reliable. A familiar-sounding voice may be genuine, but it may also be synthetic or manipulated.

People do not need to treat every unfamiliar call as a scam. Instead, they should pay attention to unusual silence, unclear identities, requests for sensitive information and pressure to transfer money. When something seems wrong, ending the call and verifying the facts independently is safer than continuing the conversation.

Staying silent for three seconds creates a moment to think. Protecting your money ultimately depends on verifying identities, safeguarding personal information and refusing to make rushed transfers.As AI-enabled fraud evolves, these basic habits remain essential to reducing the risk of becoming a victim.