Missed-call text-back: how it works, what to send and the rules

When a call to your business goes unanswered, a texting platform sends the caller a short message from your business. The caller can reply or wait for your call back, and you see the conversation in one place. You may also see it called missed-call auto-reply, auto text-back or MCTB.

1. A customer calls your business number and no one picks up: you’re on a roof, under a sink or closed for the day.
2. Your phone system passes the unanswered call to the text-back platform, which reads the caller’s number.
3. The platform texts the caller right away, with your business name, what happens next and one easy action.
4. If the caller replies, the message goes to a shared inbox or to an AI assistant that says it is automated and hands off to a person on request.
5. You or your office call back, with the caller’s reply already in front of you.

Which number the text comes from depends on how the platform connects to your line. It matters, because a text from an unfamiliar number is easy to ignore or mistake for spam:

• Forwarding unanswered calls: your carrier sends calls you don’t pick up to a number the platform owns. Setup is quick, but the text usually comes from the platform’s number, which the caller has never seen.
• Text-enabling your existing number (“hosted SMS”): your carrier keeps handling the calls and the platform handles texts on the same number. Hosted SMS covers only the texts. The platform still needs to learn about missed calls. That usually means no-answer forwarding to a platform number or a connection to your phone system, while the text goes out from your own number. Twilio, for example, hosts only U.S. and Canadian landline and toll-free numbers, so a business line that is a cell phone usually can’t be text-enabled this way (Twilio: hosted numbers).
• Moving your number to a phone platform that handles both calls and texts: one number for everything, and your phone service moves to that platform.

Forwarding codes and ring timers vary by carrier and plan. On a Verizon Wireless phone, *71 plus a number forwards calls when the line is busy or after three or four unanswered rings. *73 turns forwarding off (Verizon: call forwarding). Codes for other plans and carriers differ, so check your carrier’s instructions. Make sure forwarding happens before your voicemail answers, or the platform never sees the call. Once unanswered calls forward to the platform, the platform also takes the voicemail, so check what callers hear.

Can your phone do this on its own? An iPhone, or an Android phone with Google’s Phone app, lets you decline a ringing call with a text: tap Message and pick a reply (Apple: answer or decline calls; Google: Phone app help). That only works while you see the call and tap it, so calls you never see get no text. CTIA, the wireless industry association, treats a person’s phone auto-replying to a call as personal use, and a business’s automated texts as business messaging (CTIA Messaging Principles, section 4.1.2).

A good text-back is short, plain and useful. In a few sentences it does five things:

• It names your business in the first words, so the caller knows who is texting.
• It says what happens next: when you will call back, or that they can reply here.
• It asks for one easy action, such as a few words about the job or a photo.
• It stays non-promotional, with no coupons, discounts or offers.
• It ends with how to opt out, such as “Reply STOP to opt out.”

Match the text to the moment. During working hours it can promise a call back soon. After hours it should say when you open. For trades with emergencies, such as plumbing, HVAC or electrical work, it should tell callers with an urgent problem how to reach someone right away.

Put safety first. If anyone is in danger or the caller smells gas, the text should tell them to leave and call 911 or the gas utility’s emergency line. Your own emergency number comes after that.

Leave out long explanations, links to your home page and anything that reads like an ad. Keep each text short and use plain characters. A plain text fits 160 characters, while curly quotes or emoji switch it to an encoding that fits 70. Longer texts are split and billed as several messages (Twilio: SMS character limit). Once the braces are filled in, aim for one message.

Copy these templates and fill in the parts in braces. Each one names the business and ends with an opt-out line, and they use straight apostrophes to stay in the plain SMS character set.

Send at most one text to a number in a set window, such as a day, even if it calls several times. To offer online booking, send your booking link in a reply once the caller texts back. If you put a link in the first text, use one that goes straight to scheduling, with no offers, prices or other pages. Keep late-night texts strictly about the missed call. If a text could read as a sales message, federal and some state quiet-hours rules may apply. Ask a lawyer whether to hold late sends until morning. The emergency version may run past one message, because the safety line comes first.

We know of no FCC ruling or court decision on missed-call text-back itself, and the closest FCC statements point in different directions. Here is what is settled, what is open and how to run it carefully.

What is established:

• Text messages count as calls under the federal Telephone Consumer Protection Act (TCPA) (FCC 2015 ruling, para. 107).
• For automated texts covered by the TCPA, people can, for now, opt out by any reasonable means. A reply of stop, quit, end, revoke, opt out, cancel or unsubscribe always counts. Opt-outs must be honored within a reasonable time and no later than 10 business days. These rules took effect on April 11, 2025 (FCC 2024 order, Appendix A; FCC order on the effective date).
• After an opt-out, you may send one text that only confirms it, with no marketing. A confirmation sent within five minutes is presumed allowed (FCC 2024 order, Appendix A).
• A marketing text to a mobile number on the National Do Not Call Registry requires the person’s prior express invitation or permission (FCC 2023 order, para. 26). That is one more reason to keep promotions out of a text-back.
• Federal rules bar telephone solicitations to residential subscribers before 8 a.m. or after 9 p.m., local time (47 CFR 64.1200(c)(1)).
• U.S. carriers expect businesses that text from software over a regular 10-digit number to register a brand and a campaign (A2P 10DLC) through their messaging provider (The Campaign Registry). The campaign must describe how people opt in, opt out and get help (Twilio: A2P 10DLC). This is a carrier rule, enforced by blocking: Twilio has blocked texts to U.S. numbers from unregistered 10DLC numbers since September 1, 2023 (Twilio: full blocking). Toll-free numbers and short codes have separate processes.
• Landline numbers generally cannot receive texts, and Twilio returns an error when a text is sent to one (Twilio: error 30006). Callers on a landline need a call back.

What varies or is still open:

• Whether a missed call counts as a request for a text. The FCC has said a single, immediate text that only answers a consumer’s request does not violate the TCPA. That ruling applies only when the consumer expressly asked for the text, and in that case the consumer had texted first (FCC 2015 ruling, paras. 103 to 106).
• Whether caller ID counts as permission. The FCC has also said that a number captured by caller ID without notice to the caller is not permission for autodialed calls. That 1992 position is quoted in the same 2015 ruling (FCC 2015 ruling, note 205).
• Whether the federal consent rules reach your tool, and how courts read them. The rules cover texts sent with an “autodialer,” which the Supreme Court limited to equipment using a random or sequential number generator (Facebook v. Duguid, 2021). Whether a text-back tool qualifies depends on how it works. In TCPA lawsuits, federal district courts now decide what the law means, and the FCC’s reading does not bind them (McLaughlin Chiropractic v. McKesson, 2025).
• How carriers and your provider classify it. Under CTIA’s voluntary Messaging Principles, an exchange is conversational only when the consumer texts first. Informational texts assume the consumer gave their number to be contacted. Promotional texts need written consent, and any prompt to buy can make a text promotional. A text-back after a voice call fits neither of the first two cleanly, so your provider may expect documented consent or notice. CTIA also counts a business’s automated replies as business messaging, which is why registration applies (CTIA Messaging Principles, Exhibit II and section 4.1.2).
• Florida. A text sent to solicit a sale, or to gather information for one, is a telephonic sales call. Asking for an address or photo to quote could arguably count. Unsolicited ones sent with an automated system need prior express written consent. Texts answering an express request, or sent to someone with a prior or existing business relationship, are excluded. Whether a missed call is an express request is unsettled (Florida Statutes §501.059).
• Oklahoma. As enacted in 2022, the law requires prior express written consent for automated commercial sales calls, and its consent definition covers texts. It has no exclusion for requested calls, though some sales are exempt, such as one closed at a later face-to-face meeting. It also limits solicitation calls to 8 a.m. to 8 p.m. and three in 24 hours on one subject (Oklahoma HB 3168, 2022).
• Washington. A business may not send texts that promote goods, services or property to a Washington resident’s cell phone without clear consent in advance (RCW 19.190.010; RCW 19.190.060; RCW 19.190.070). That is one more reason to keep text-backs free of promotion.
• Changes under way. A 2024 FCC rule would make an opt-out from one kind of message stop all of a sender’s automated calls and texts. It is delayed until January 31, 2027, and the FCC may change it before then (FCC order).

In practice:

• Send one non-promotional text right away, about that call only, and at most one to the same number in a set window, such as a day.
• Tell callers in your greeting or voicemail message that they may get a text at the number they called from, and how to stop it. This notice may lower the risk, but no ruling confirms it is enough.
• Name your business and use standard STOP wording, such as “Reply STOP to opt out,” as CTIA recommends (CTIA Messaging Principles, section 5.1.3).
• Stop texting anyone who opts out, by STOP or any other clear wording, and keep a record. Keep doing so until any new FCC rule takes effect and your provider confirms how it handles opt-outs.
• Register your number for business texting before the first text, and describe the call and your greeting notice as the opt-in.
• Check whether the caller is on a landline, and put those callers on a call-back list.
• If you text customers in a state with its own texting law, such as Florida, Oklahoma or Washington, ask a lawyer how it applies.

Sources checked October 1, 2026. Rules change, so confirm the details with your messaging provider before you go live. This is general information, not legal advice.

The text is only the start. Decide in advance what happens in each of these cases:

• The caller replies: the reply goes to a shared inbox your office or crew lead watches. Or it goes to an AI assistant that says it is automated, answers from approved information, books the job and hands off to a person on request.
• The caller left a voicemail: if your system can tell, send the voicemail version of the text instead of the missed-call one, never both.
• The caller is on a landline: the text fails. Some providers can check the line type before sending; put landline callers on a call-back list.
• The call looks like spam: skip blocked or hidden numbers. Spam calls often show a spoofed real number. If your platform supports it, also skip calls your carrier or provider flags as likely spam, and calls that hang up within a few seconds. This cuts down texts to people who never called you.
• It is an emergency: the text sends anyone in danger to 911 first, then points to your emergency line, and urgent replies reach a person first.
• The caller opts out: texts to that number stop at once, the caller gets one confirmation at most, and the opt-out is logged.
• No one has called back yet: set a rule that every missed call gets a call back within a set time, and track it. The text tells the caller you’re on it; the call back is where you book the job.

Line-type checks come from the texting provider. Twilio’s Lookup service, for example, can classify a number as landline, mobile or VoIP (Twilio: line type intelligence).

To see an AI assistant work through a new lead, try the free Estimate Recovery Desk demo. Submit a sample lead and watch it draft a text and email reply, qualify the lead and write the owner alert.

Your own records answer this better than any industry average. Multiply three numbers:

Missed calls from potential new customers in a month × the share of those callers who would have booked a job × your average job value.

1. Missed calls: pull a month of call logs from your carrier or phone system and count the unanswered calls from numbers that aren’t already customers. Leave out spam, and count repeat calls from the same number once.
2. Share that would have booked: over the same month, look at the calls you did answer from new customers and work out how many became a booked job. Use that rate, and round it down, since some missed callers only had a quick question.
3. Average job value: take your new-customer jobs from a recent period in your invoicing or accounting software and divide what they brought in by the number of jobs.

The result is a rough monthly figure for the work that reaches your phone and goes unanswered. No tool wins all of it back. Use it to judge how much effort a fix deserves, then measure again a month after you go live.

We don’t publish prices, because every setup is different. These are the factors that move the cost:

• How it connects to your line: forwarding, text-enabling your existing number, or moving your number.
• How many texts you send, which follows your call volume.
• How long each text is: a long text, or one with curly quotes or emoji, can be billed as several messages.
• Carrier registration for business texting (A2P 10DLC).
• Where replies go: a shared inbox, or an AI assistant that answers and books.
• Connections to your calendar, CRM or job management software.
• One-time setup and testing, compared with the ongoing monthly usage.

No. Text-back reaches callers after the call ends, and an AI receptionist answers the call itself. The two work well together, because each covers a gap the other leaves.

Text-back is the lighter place to start, though on its own it can’t replace an answering service: no one answers the call. If your call logs show many routine questions or after-hours calls, an AI receptionist can answer them on the spot. Our guide to AI receptionists and answering services covers that choice, and you can chat with one in the free AI receptionist demo.

1. Pull a month of call logs and note when you miss calls: during jobs, at lunch, after hours, on weekends.
2. Choose how it connects: forwarding unanswered calls, text-enabling your existing number or moving your number. Prefer an option where the text comes from the number the customer dialed. Text-enabling still needs forwarding or a phone-system connection, so the platform sees the missed call.
3. Register for business texting (A2P 10DLC) through your messaging provider. The campaign form asks how people opt in: describe the trigger (the customer called you) and your greeting notice. Attach your message samples and allow time for review before launch.
4. Update your greeting or voicemail message to say callers may get a text at the number they called from, and how to stop it.
5. Write your texts: one for working hours, one for after hours, and an emergency version if your trade has emergencies. Each names your business and ends with “Reply STOP to opt out.”
6. Set the rules: at most one text to a number per day, and no texts to blocked, hidden or likely spam numbers or very short hang-ups. Check for landlines, and stop texting anyone who opts out.
7. Decide where replies go: a shared inbox, a crew lead’s phone or an AI assistant that hands off to a person.
8. Test with phones on different carriers. Call during and after hours, let it ring out, hang up early, call from a hidden number and from a landline, and reply STOP. Check that forwarding happens before voicemail, listen to what callers hear after forwarding, and confirm the text comes from the number you expect.
9. Go live, read every conversation for the first few weeks, count missed calls again after a month, and adjust the wording.

The most common mistakes to avoid:

• Texting from a number the caller has never seen, so the text reads like spam.
• Forwarding that starts after voicemail answers, so the platform never sees the call.
• Sending from a number that isn’t registered for business texting, so carriers block the texts.
• Adding coupons, offers or sales links.
• Texting landlines instead of calling those callers back.
• Sending several texts when the same person calls more than once.

We set up missed-call text-back, lead capture with instant follow-up and AI receptionists as part of our AI automation service, connected to the tools you already use.