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Missed call text back: how it works for trade businesses

T. Krause6 min read

Missed call text back sends a caller a text when nobody picks up. How it works with call forwarding, what the text should say, and when it beats voicemail.

Miniature diorama: a plumber kneels at a sink inside a cut-away house while a customer at the garden gate holds a phone under a glowing amber speech bubble, and a lit desk phone in an empty office is wired to the van outside

A plumber is on his back under a kitchen sink with a wrench in one hand. His phone buzzes in his pocket and stops. The caller has water coming through the ceiling, doesn't leave a message, and rings the next plumber on the list. By the time the first plumber checks his phone, that job is gone.

Missed call text back is a small fix for that minute. When a call goes unanswered, the caller gets a text from your business within moments. It says you are on a job and asks for what you need to ring back. Some callers reply, and a reply is a lead you would otherwise never have known about.

This guide covers how it works, how it fits with call forwarding, what the text should say, when it beats voicemail, and the German rules on business texts. It is written for owner-run trade businesses in Germany.

What missed call text back is

It is one automatic text, sent to the number of a caller you didn't answer. The missed call triggers it, and nothing else does. The caller reached out first, and the text answers that call.

A text back is not a chatbot and not a marketing campaign. Some products bolt both onto it, and that is where the trouble with consent starts, which I come back to below.

How it works with call forwarding

Two things have to happen. Something has to notice that the call went unanswered, and it has to know the caller's number. There are two common ways to set that up.

Your phone system does it. Some cloud phone systems and business phone apps have a missed-call text setting built in. Your number stays where it is, and the system sends the text when a call rings out. Look in your provider's settings or help pages before you buy anything separate.

You forward unanswered calls to a text-back service. The service gives you a number. You set conditional forwarding on your business line so that calls nobody answers, and calls that arrive while you are busy, go to that number. The service picks up, plays a short line such as "We're on a job, we'll text you now", and sends the text to the caller. The guide to conditional call forwarding has the codes and the ring times.

The forwarding route depends on the caller's number arriving at the service with the forwarded call. Ring your own business line from a mobile, let it go unanswered, and check that the text reaches that mobile before you rely on it.

Your phone's own quick-reply feature is a different thing. Most phones let you decline a call with a short text. That helps when you see the call and can't take it. It does nothing for the call you never saw because you were on a roof.

A few limits apply to every set-up:

  • A caller who withholds their number gets no text, because there is no number to send it to.
  • A caller on a landline won't see the text on a phone screen. Ask your provider what happens to texts sent to landline numbers on its network.
  • Someone still has to read the replies and call back. The text buys you time. It doesn't do the job.
  • Send from a number that can receive replies. If the service sends from a number nobody reads, say so in the text and give the number to call.

What the text should say

The caller has probably rung three firms. The text has to tell them which one you are, why you didn't answer, and what happens next. Keep it short enough to read on a lock screen.

During working hours:

Hello, this is Muster Plumbing. Sorry we missed your call, we're out on a job. Reply with your name, address and what the problem is, and we'll call you back today. If water is leaking, turn off the stopcock first.

After hours:

Hello, this is Muster Plumbing. We're closed for the evening. Reply with your name, address and what you need, and we'll call you back tomorrow from 7.30.

Write a callback time you can keep. "We'll call you back within 10 minutes" reads well until the day you are in a cellar with no signal for an hour. A promise you break costs more than no text at all.

Leave out offers, discounts and links to your other services. The text answers one call. Once it starts selling, it becomes a different kind of message under German law.

When it beats voicemail

When the caller won't leave a message. Many callers hang up at the greeting. The one-week missed-call audit shows how many of your own callers do it. A text reaches those callers too.

When the caller can't talk. Someone ringing from their desk at work can reply to a text in a meeting. They can't call you back from one.

When you need the details in writing. A reply with the address and "boiler shows error F28" is easier to act on from a ladder than a voicemail you have to listen to twice.

Voicemail still wins for landline callers and for callers who withhold their number, and some customers would rather explain the problem in their own words. You don't have to pick one. Keep a short voicemail greeting and send the text as well.

Neither is enough once missed calls pile up. The audit article suggests that under ten missed customer calls a week, a text auto-reply with forwarding to a mobile will usually do. Above that, every text is a callback you owe, and the callbacks become the next job nobody has time for. At that point the question is whether a person or software picks up, and AI receptionist vs answering service compares the two.

Consent and messaging rules in Germany

This part is a summary of the rules as I read them, not legal advice.

Section 7 of the German Unfair Competition Act, the UWG, says in subsection 2, number 2, that advertising by "electronic mail" without the recipient's prior express consent is an unreasonable nuisance and not allowed. The EU ePrivacy Directive 2002/58/EC, which that rule implements, defines electronic mail in Article 2(h) as any text, voice, sound or image message sent over a public communications network that can be stored until the recipient collects it. A text message fits that definition. So a text that advertises needs consent.

A text back that only answers a call the customer just made, and offers nothing, is a reply rather than an advert. Where exactly the law draws that line is a question the statute itself doesn't answer, and I am not going to pretend it does. Keep the text to the call, leave out every offer, and don't add the caller's number to a marketing list afterwards. If you want to use the number for anything beyond this one reply, read the article on consent for database reactivation first.

Data protection applies as well. The caller's number is personal data. Your privacy notice should say that you reply to missed calls by text. If an outside service sends the texts, the GDPR requires a data processing agreement with it under Article 28. Ask the provider for theirs before you switch it on. If you are unsure about any of this, an hour with a lawyer who knows the UWG is cheaper than a warning letter.

When the text isn't enough

A text back answers the call with a promise to call back. Our AI receptionist answers the call itself. It picks up when your team can't, tells the caller from the first sentence that they are talking to an AI, takes the name, address, callback number and what the job is, and books a slot in your calendar if you want it to. The caller gets a text confirming the appointment, and you get a written summary of the call.

The plumber under the sink would have kept that job with either one. With the text, he would have called back from the van and found out it was a burst pipe. With the receptionist, he would have found it already in his calendar.