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Why it works, honestly stated
The mechanism is not subtle. Somebody with a problem searches, finds three firms, and starts dialling. Whoever engages first has an enormous advantage, because by the time the second firm rings back the caller has often already arranged something. A text arriving while your number is still on their screen puts you back into that comparison at effectively no cost.
You will see this argued with a famous statistic about responding within five minutes, and it is worth being precise about what that evidence is. The research is an analysis by James Oldroyd of lead response behaviour at six companies, carried out in 2007, popularised through a Harvard Business Review article published in March 2011. The striking headline numbers are odds ratios rather than probabilities, which is a distinction almost every marketing article quoting them has lost over the intervening years. It is a small, old, business-to-business dataset. Treat it as directional support for something you can observe yourself — that speed of response matters a great deal — rather than as a measured law that predicts what will happen in your firm.
The better argument needs no research at all. You already know how many calls you do not answer in a week, and you already know what an average job is worth. Multiply the two, discount heavily for the people who ring back anyway, and the case makes itself.
How a missed call is actually detected
This is where most installations go wrong, because the software cannot text a caller it never knew about. Something has to observe the call and report that it went unanswered. There are four workable arrangements.
| Arrangement | How it works | Watch out for |
|---|---|---|
| Tracked number that forwards | You advertise a new number; it rings your existing phone. The platform sees the call, sees it was not answered, and texts. | Changing the advertised number everywhere, including Google Business Profile, the van and the website. |
| Conditional forwarding from a mobile | Your mobile is configured to divert unanswered and busy calls to the platform, which then texts the original caller. | Network support varies, and the settings can be reset by a handset update or a new SIM. |
| Business phone system integration | A VoIP system reports call events directly, so missed calls are known without diverting anything. | Requires the provider to expose call events, which not all low-cost providers do. |
| Porting the number in | Your existing number moves onto the platform, which handles routing and detection natively. | Cleanest long term, slowest to arrange, and it needs care with a number the business has used for twenty years. |
For most small trade firms the tracked forwarding number is the right start, because nothing about the existing setup has to change and it can be reversed in an afternoon. It also brings a side benefit worth having on its own: every call becomes countable, so you finally know how many you are missing rather than guessing.
One detail decides whether any of the four arrangements behaves sensibly: what counts as missed. A call that rings out is obviously missed. A call that goes to voicemail and where somebody leaves a message probably should not trigger an automatic text saying you will ring back, because you now have two contacts saying the same thing and one of them sounds like a machine talking over a person. A call answered after four seconds and cut off is ambiguous. Set these rules deliberately at build time rather than accepting whatever the platform defaults to, and test the awkward cases yourself from a phone that is not connected to the business.
The telephone-number problem
Three separate issues live here, and they are the reason otherwise sensible installations do nothing.
A landline cannot send a text. If your advertised number is a geographic landline, the reply has to come from somewhere. Either the number is text-enabled by a provider who can do that, or the message is sent from a different number, which creates a small but real problem: the caller receives a text from a number they do not recognise, about a call they just made, and some of them will distrust it. If the message has to come from a different number, the first six words must make the connection explicit.
The caller has to be able to reply usefully. A text sent from a number that cannot receive replies is a dead end, and a surprising number of budget configurations do exactly that. Whatever number sends must accept inbound messages, and those messages must land somewhere a human will see within minutes.
Withheld and non-mobile callers. A proportion of your missed calls are from withheld numbers, from landlines that cannot receive texts, or from businesses with a switchboard. The automation cannot help with those, and it should not be counted against it. In practice this is a smaller share than people expect in domestic work and a larger one in commercial, which is a useful thing to know before judging the results.
What the message should say
Two sentences, no more. It has to do four things and nothing else: identify who is texting, explain why it is a text and not a call, ask a question that invites a reply, and say when a human will ring.
The shape to aim at is close to this, with your own name and firm in place of the brackets: “Sorry we missed you — [name] at [firm] here, we are up on a job and cannot pick up safely. What is the problem and where are you? We will ring you back within the hour.” Read it aloud. If it does not sound like something you would actually say standing on a roof, rewrite it until it does, because the caller is judging whether a competent human being exists at the other end and nothing signals otherwise faster than corporate phrasing.
What ruins it, in order of how often we see it:
- Length. Anything over about two sentences reads as a broadcast. It is also likely to split across multiple messages.
- Cheerfulness. “Thanks so much for reaching out!” is not how anybody in the trades speaks and the caller notices immediately.
- No question. A message that only says you will call back invites nothing. The question is what turns a notification into a conversation.
- A promise you will not keep. If you cannot ring back within the hour, do not write the hour. A broken commitment made by a machine is worse than no message.
- A marketing sign-off or a link to the website. The caller has already been to the website. That is why they rang.
Vary it by time of day if nothing else. Out of hours the message should say so and offer the first slot tomorrow rather than promising an imminent call from somebody who is asleep. Vary it by trade too: a physiotherapy clinic and a drainage firm cannot sensibly send the same words.
What happens when somebody replies
The automation has now done its job and created a live conversation, which is the point at which many setups collapse because nobody defined where that conversation goes.
- Replies land in one shared inbox that the person answering the phone can see on a phone, not in an application only the owner has installed.
- Somebody owns it during working hours. A reply that waits two hours has thrown away the entire advantage the text just bought.
- The enquiry is created automatically in the pipeline with the number, the time and the source attached, so it cannot be lost between the message and the diary. That is the join between this and the wider follow-up system.
- Non-replies get exactly one more contact. A single message the following morning offering a call is reasonable. A sequence is not: this person made one phone call, and treating that as consent to a campaign is how you earn a complaint.
Out of hours needs a decision made in advance rather than improvised. Either the message sets an honest expectation for the morning, or, if the work is genuinely urgent and you genuinely cover it, the reply routes to whoever is on call. What does not work is an out-of-hours text implying immediate attention that nobody will provide until Monday.
Where the rules sit
Sending an automated text to somebody who has just rung your business is not marketing. It is a response to an approach they initiated, about the thing they were ringing about, and that is ordinary business correspondence. This is the important distinction to preserve and it is preserved by keeping the message relevant to the call.
The line is crossed when the number is later used for something else: an offer, a newsletter, a seasonal campaign. That is direct marketing, it needs a proper basis and a record of consent, and it needs a working way to opt out. The practical rule for a trade firm is to keep two lists and never let the first quietly become the second. Honour any request to stop immediately and permanently, keep a record that you did, and do not send anything automated from a number that cannot receive the word stop.
Measuring it, and the four ways it fails
Four numbers tell you whether it is working, and all four should be visible within a month.
- Missed calls per week. Almost always higher than the owner believed, and on its own worth the exercise.
- Texts successfully delivered as a share of those missed calls. The gap is your withheld and non-mobile callers.
- Reply rate. The wording lever. If it is poor, rewrite the message before changing anything technical.
- Conversations that became quoted jobs. The only figure that matters commercially, and the reason the enquiry must be created in a pipeline rather than left in a messaging app.
The four failure modes, in the order we encounter them: the platform never learns about the missed call because the forwarding was never configured properly; the text arrives from a number the caller does not recognise with no explanation; nobody is watching the inbox, so replies sit; and the message is three cheerful sentences that read as an advert. Every one of those is a configuration problem rather than a flaw in the idea.
Finally, the honest limit. This recovers callers, it does not create demand. If you take four calls a week, missing one of them is not your constraint and this will not change your year — the money belongs in generating enquiries or in the site those enquiries land on, and you can size that decision with the cost per lead calculator. If you take sixty calls a week and answer forty, this is the highest-return hour of configuration available to you, and it is the first thing we would build. We will tell you which of those two you are on a first call, without charging for the conversation.
Rather have someone else do this?We run exactly this for trade and construction firms across the UK. Call and we will tell you what is realistic in your area, including when the answer is that it is not worth it.
Call 07443 392243WhatsAppCommon questions
Does it work if my number is a landline?
Yes, with a caveat worth planning for. Either the landline is text-enabled by a provider who supports it, or the message goes out from a separate mobile number and the opening words have to make clear who is texting and why. The second arrangement works, but it loses a few people who distrust an unfamiliar number, so the identification has to come first in the message rather than at the end.
How quickly should the text go out?
Within about a minute of the call ending. The value comes entirely from arriving while the caller is still deciding who to try next, and a message that lands twenty minutes later is a courtesy rather than a recovery. There is no advantage in a deliberate delay and there is a real cost to one.
What if somebody rings by accident or it is a sales call?
You will text a few wrong numbers and the occasional cold caller, and nothing bad happens. A short, specific, human message reads as competence even to somebody who dialled in error. The ones that cause irritation are long promotional messages, which is one more reason to keep the wording plain.
Can this replace answering the phone?
No, and firms that treat it that way end up worse off. It is a safety net for the calls that physically cannot be answered, not a substitute for picking up. If your answer rate is poor because nobody is assigned to the phone rather than because everybody is on site, fix the assignment first. The automation will otherwise disguise a staffing problem for about six months.
How much does the sending cost?
Text messages are charged per message by whichever platform sends them, at a small fraction of a pound each, so the running cost is trivial against any trade job value. The number you should watch is not the cost but the delivery rate, because a configuration that silently fails to send costs nothing and recovers nothing.