Missed call text back: setup, scripts and the US texting rules

What is missed call text back?

Missed call text back is an automatic text message sent to a caller when your business does not answer. The caller hangs up, and within seconds they get a text from your number asking how you can help, so the conversation moves to text instead of ending at voicemail.

It works because people who call a local business usually want something now: a booking, a price, a yes or no. If nobody answers, they try the next result on the map. A text tells them a real business saw the call and will deal with it. For the short definition, see the glossary entry on missed call text back or the quick answer to what is missed call text back.

Speed matters more than wording. Research published in Harvard Business Review found that most companies are not responding to leads nearly fast enough (HBR, The Short Life of Online Sales Leads). A text that lands before the caller has dialed a competitor gives you the first reply. See how fast a business should reply to a lead and the glossary entry on lead response time.

The US texting rules to check before you switch it on

Business texting in the US has two layers of rules: the carriers decide which messages get delivered, and federal law (the TCPA) sets consent rules for automated calls and texts. This section explains what each one asks of you. It is not legal advice: talk to your counsel about your own messages, industry and state.

Carrier registration: A2P 10DLC and toll-free verification

A text sent by software from a regular 10-digit business number is called A2P (application to person) 10DLC traffic. Carriers require the business (the "brand") and the use case (the "campaign") to be registered with The Campaign Registry, through your texting provider. Businesses do not register directly; the provider does it for you.

Unregistered traffic is not delivered. Twilio, for example, states that messages to the US from unregistered 10DLC numbers are blocked (Twilio changelog). Toll-free numbers have their own process: messaging on unverified US toll-free numbers is blocked too (Twilio changelog).

Consent and opt-out under the TCPA

• Consent. The TCPA requires consent for many automated texts to mobile phones, and the type of consent depends on whether the message is informational or marketing. A reply to a call the customer just made is a different situation from a promotional blast, but whether your text needs consent, and what kind, is a question for your counsel.
• Opt-out. Since April 11, 2025, the FCC rule lets people revoke consent by any reasonable means, and businesses should honor opt-outs within 10 business days (National Law Review). The separate "revoke all" part (an opt-out from one kind of message applying to unrelated messages) has been delayed to January 31, 2027 (Burr & Forman).
• One-to-one consent. The FCC rule that would have required consent per seller was vacated by the Eleventh Circuit in January 2025 (National Law Review).
• Carrier best practices. The wireless industry publishes its own expectations for consent, opt-out and content (CTIA Messaging Principles and Best Practices). Registration reviewers check your sample messages against them.

How to set up missed call text back in five steps

1. Check your number can text

   Many landlines and some VoIP numbers cannot send texts until your provider text-enables them. Ask your phone provider, or use a texting platform that can host texting on your existing number.

2. Register the brand and campaign

   Your provider submits A2P 10DLC (or toll-free verification). Have your legal business name, EIN, website, and two or three sample messages ready. Approval can take days, so start here.

3. Set the trigger rules

   Decide which calls trigger a text: missed, busy, after hours, abandoned in the phone menu. Exclude your own staff numbers and known spam.

4. Write the messages

   One for business hours, one for after hours. Name the business, say why you are texting, offer the next step, and include an opt-out line. Use the scripts below.

5. Route the replies

   Replies must land somewhere a person or an AI receptionist answers fast: a shared inbox per location, not one manager's phone.

Missed call text back scripts you can copy

Good scripts are short, name the business in the first words, ask one question, and give a way to stop. Keep them informational: no offers or discounts in an automatic reply to a call.

Hi, this is {business name}. Sorry we missed your call, we are with a customer.
How can we help? Reply here and we will get back to you within {X} minutes.
Reply STOP to opt out.

Hi, this is {business name}. We are closed right now and open again at {opening time}.
Reply with what you need and we will pick it up first thing. To book now: {booking link}
Reply STOP to opt out.

Hi, {business name} here. We missed your call.
Want to book? Pick a time here: {booking link}
Or reply with your question.
Reply STOP to opt out.

{business name} here, sorry we missed you. Is this urgent?
Reply 1 for an emergency and we will call you back right away, or 2 to schedule a visit.
Reply STOP to opt out.

Hi, this is {business name} {location name}. Sorry we missed your call.
How can we help? Reply here and our {location name} team will answer.
Reply STOP to opt out.

How to measure missed call text back

You need three numbers per location, every week. Most platforms show them; if yours does not, a simple sheet works.

To see which ads and listings produce the calls you miss, pair text back with call tracking. A tracked number per source tells you whether the missed calls come from Google, from ads or from your website.

Text back or an AI receptionist?

Text back recovers the call after it is missed. An AI receptionist answers it in the first place, and sends a text back only when the caller hangs up anyway. Many businesses start with text back, then add an AI receptionist for after hours and busy periods. The guide to how AI receptionists work explains the difference in detail, and the after hours answering service guide compares the options for nights and weekends.

Answer the call, and text back when you cannot

Desk by Locus Intelligence answers calls, WhatsApp, website chat and forms for every location, and sends a missed call text back when a caller hangs up. Replies land in one inbox, by location.

Book a demo

See how text back fits with Desk automations and the AI answering service, or read the pillar on the AI receptionist for multi-location businesses.

Google Business Profile audit

Business nameAudit

Free. You get a profile score, your Maps rank against the top 3, and the fixes that matter most.