How do you build trust with a stranger on the phone, fast?

The buyer starts from distrust

A stranger calling about a product starts at a disadvantage. Hiya, a caller-identification company, reports in its State of the Call 2026 that 86% of unknown calls go unanswered, from a survey of more than 12,000 consumers in six countries. The FTC’s consumer advice on phone scams tells people that scammers can make any name or number show on caller ID, and that the safe response to a doubtful call is to hang up.

So the buyer who does answer is listening for reasons to end the call. That suspicion is reasonable, and the agent’s first job is to remove those reasons. Trust also comes up as an objection in its own right: in MaxContact’s analysis of more than 800,000 objection calls on its own platform, published on Call Centre Helper, about 22% of objections were about trust. That is one vendor’s data, with region and products not stated.

The opening seconds

Say who you are, who you are calling for and why, before anything else. On a US sales call this is also the law: the FTC’s guide to the Telemarketing Sales Rule says the caller must disclose, promptly and before any pitch, the seller’s identity, that the call is to sell something, and what is on offer. The same guide says describing a sales call as something else would be untruthful.

The data on openers points the same way. Gong, a vendor of call-analysis software, studied 90,380 cold calls, all first interactions, counting a booked meeting as success, and reported in its article on cold call opening lines that calls opening with a clear reason for calling succeeded 2.1 times as often as its baseline. Asking whether it was a bad time did worse than the baseline. The article does not say whether these were business or consumer calls, and does not give the period or the industries, so it may not carry over to consumer telesales.

A plain opening has four parts:

1. Your name and the company you are calling for.
2. Why this person: the enquiry they made, the policy they hold, the account they have.
3. What you would like: a few minutes, and what they get from them.
4. A question that lets them answer, not a pitch.

Liking and empathy, done honestly

Robert Cialdini’s Influence (1984) describes liking: we say yes more readily to people we like and who are like us. On the phone that means rapport that is real, not flattery or a borrowed hometown. Carl Rogers (1957) put the weight of empathy on the other person perceiving that they have been understood. Chris Voss’s tools from Never Split the Difference (2016) make that practical: label the feeling you hear, repeat the buyer’s last few words so they keep talking, ask "how" and "what" questions.

The order matters. Let the buyer talk before you present, and say back what you heard before you answer it. What SPIN, Cialdini and empathy say about sales calls.

In our view, agents with the same opener and the same training still differ in how fast buyers trust them, and in which buyers. That is part of why agents close at different rates on the same leads, and why it matters which agent takes which lead. Why agents close differently.

Small promises, kept on the call

In our view, trust on a short call is built from small promises kept in front of the buyer. If you asked for two minutes, check in when two minutes are up. If you said you would send the details, send them before the follow-up. If you agreed to call back on Thursday at six, call on Thursday at six. Each one shows the buyer how the rest of the relationship will go. Handling "call me back".

What destroys trust

• Pressure to decide now. The FTC tells consumers that honest businesses give them time and that pressure to decide on the spot is a warning sign. When to ask for the sale on the first call.
• Urgency that is not real. A deadline you will not honour sounds like every scam call the buyer has had.
• A vague reason for calling. If the agent cannot say plainly why they are calling this person, the buyer fills in the worst reason.
• Asking for sensitive details too early. The FTC lists unexpected requests for sensitive information or unusual payment methods as scam signs. Ask for bank or card details only once the buyer has agreed to buy, and say why you need them.
• Sounding read. In experiments by Victorino and colleagues, customers could tell how heavily a service encounter was scripted. Script or own words.
• Arguing with a no. A buyer who asks not to be called again is making a do-not-call request, which your floor must honour.

Sources

• Hiya, State of the Call 2026: a caller-identification company’s consumer survey on answering and trusting phone calls.
• FTC consumer advice, "Phone Scams": what the FTC tells consumers to watch for, including caller ID spoofing, pressure and requests for sensitive data.
• FTC, "Complying with the Telemarketing Sales Rule": the regulator’s guide, including the disclosures due before any pitch.
• Gong, cold call opening lines: a call-analysis vendor’s study of cold call openers.
• Call Centre Helper, "What 800,000 Sales Calls Taught Us About Handling Objections": MaxContact’s analysis of objection calls on its own platform.
• Victorino, Verma, Bonner and Wardell, "Can Customers Detect Script Usage in Service Encounters?": Journal of Service Research; an experimental video study, record at Cornell eCommons.
• Rogers, "The Necessary and Sufficient Conditions of Therapeutic Personality Change": Journal of Consulting Psychology, on empathic understanding.
• Influence, Robert B. Cialdini and Never Split the Difference, Chris Voss with Tahl Raz: book records.