Missed call text back is a simple idea: when a call goes unanswered, the caller automatically gets a text from your business number, so the conversation does not end at voicemail. We set it up on HighLevel, but on our accounts it is not live yet, and this page explains why.
Texting is not live yet. Voice works today. Text messages (missed call text back, text reminders and texted review requests) switch on once carrier approval clears; that approval is the A2P 10DLC registration US carriers require for business texting from a regular local number. We do not offer missed call text back, text reminders or any texted follow-up as working today. Everything on this page about automated texts describes what switches on after approval.
Most pages about missed call text back software are written to sell it. This one is written to tell you where things stand. You will find what the feature does, what a business has to register before any automated text can be sent, what we do for missed calls today, how to answer a missed call by text by hand in the meantime, and which rules apply once automated texting is running.
What missed call text back does
On HighLevel, missed call text back can be set up two ways. The built-in setting sits in the phone system settings: you write the message, and the ring timeout decides how long a call rings before it counts as missed. The other way is a workflow that starts when an incoming call ends with a busy or no-answer status, then sends the text.
The workflow version is the one we would use. HighLevel notes that the built-in setting sends a text for every missed call, even when the same caller tries several times in a short time, and that running the setting and a workflow at the same time can produce duplicate messages. A workflow can wait a short time, check whether the person already got a text, and only then send one.
Done well, auto missed call text back is a courtesy, not a marketing channel: one message, from the number the person called, about the call they made.
Why it is not live here: A2P 10DLC registration
A regular ten-digit local business number is called a long code, and texts sent from software through one count as application-to-person (A2P) traffic. US mobile carriers require that traffic to be registered before they will deliver it. The system is called 10DLC, for 10-digit long code.
Registration runs through The Campaign Registry, the registry the mobile network operators chose to collect brand and campaign information for 10DLC. It has two parts:
The brand
The business sending the texts. Brands do not register with the registry directly; a messaging provider submits them, and the brand's federal tax ID is used to verify that the business is real. An unverified brand cannot register a campaign.
The campaign
The use case: what kind of messages will be sent and why, such as customer care or appointment reminders. A registered campaign gets an ID, the business's numbers are tied to it, and the carriers can run their own review before they deliver that traffic.
Carriers ask for this because unregistered business texting is how a great deal of spam reaches phones. Our registration is pending. Until it clears, texts from our system could be filtered or blocked, so we do not send them and do not pretend otherwise.
What covers your missed calls today
Missed call text back exists because calls go unanswered. The other fix is to answer more of them, and that part works now.
- The AI voice agent picks up. Calls you cannot take ring through to an AI receptionist that answers questions from your facts, takes a full message or books a time. A caller who got an answer has nothing to be texted back about.
- You get the message by email. Each call produces a summary with the caller's name, number and what they wanted, sent to the inbox you choose.
- A callback list in the CRM. Callers who asked for a call back are saved as contacts with a task, so nothing sits only in a voicemail box. See CRM automation.
- Follow-up by email. Where the caller gave an email address and agreed to follow-up, the automated sequence runs by email.
How to respond to a missed call by text, by hand
Nothing stops you from replying from your own phone, person to person, today. A few starting points, written to be edited:
- The quick acknowledgment. "Hi, this is [name] at [business]. Sorry I missed your call. I'm on a job until about 3. Can I call you then, or is there something I can answer here?"
- The after-hours reply. "Thanks for calling [business]. We're closed for the evening. I'll call you back tomorrow morning, or reply with a good time."
- The unknown number. "Hi, you called [business] a few minutes ago. How can I help?"
- The returning customer. "Hi [first name], I saw your call. Is this about the appointment on [day]? I'm free to talk after 4."
- The voicemail they left. "Got your voicemail about [topic]. I can come by [day] or call you at [time]. Which works better?"
Always say who you are, answer the call they made rather than pitching something new, and stop if they ask you to.
Call back or text back?
| Situation | Better first reply | Why |
|---|---|---|
| Existing customer, during business hours | Call back | They know you and probably have a real question |
| You are busy for the next hour | Short text, then call | Tells them you saw it and when to expect you |
| Late evening or early morning | Text, or wait until morning | A call at that hour can feel intrusive |
| Unknown number, no voicemail | Text asking how you can help | Lower pressure, and screens out wrong numbers |
| Voicemail about something urgent | Call back | Urgent problems are faster to sort out by voice |
The texting rules that will apply once it is live
Automated business texting comes with consent and opt-out rules. The two places they come from:
- CTIA's Messaging Principles and Best Practices, the wireless industry guidance carriers apply to business texting, say senders should get the appropriate consent before messaging, use STOP as the standard opt-out word while also honoring plain requests such as end, cancel, unsubscribe or quit, and send one final confirmation after an opt-out with no further messages.
- The FCC's consent revocation rules let people revoke consent by any reasonable means. The FCC treats a reply of stop, quit, end, revoke, opt out, cancel or unsubscribe as reasonable on its face, and requires the request to be honored within a reasonable time not to exceed ten business days. These rules can change, so check the current version.
So when our texting switches on, every automated text identifies the business and honors STOP. Whether a text back to someone who called you is covered by the consent you have depends on your business and your state, so check your plans with your own attorney. This is a summary, not legal advice.
What switches on when approval clears
- Missed call text back from your business number, built as a workflow with a wait step so a repeat caller gets one text, not three
- Two-way replies that land in the same HighLevel conversation as your calls and emails, where you or the AI can answer
- Text appointment reminders alongside the email ones (see AI appointment booking)
- Texted review requests, for customers who agreed to receive them
- Automatic STOP handling and opt-out records on every contact
What it does not do
- Send any automated text before our carrier registration is approved
- Text people who have not called you or agreed to hear from you
- Give legal advice about your consent records or create an attorney-client relationship
- Act as a HIPAA compliance program or send clinical or patient-record detail by text
- Connect to outside phone or booking software until we have confirmed per client that it can
What it costs
Missed call text back has no separate price, and nothing is charged for a texting feature that is not live. What you can buy today is the voice side: an AI voice agent starts at $297 a month, and AI Starter is $597 a month. See the pricing page for the full list.
This is what we would rather your callers hear than a voicemail beep. Call our main line and the AI receptionist will answer, take your message and send it on.