Missed call use case

Missed call opt-in and subscriptions

Customers subscribe to your updates with one free call and unsubscribe the same way. You get a timestamped record of who agreed and when.

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Consent you can show
Easy for any customer
Equally easy to stop

What is a missed call opt-in?

A missed call opt-in lets a person subscribe to a business's SMS or WhatsApp updates by calling a published number. The call is cut automatically and free, a confirmation message explains what they will receive and how to stop, and the caller's number, time and the number called are logged as a record of consent. A second number handles opt-outs.

Updated 15 Nov 2026

Why use Missed call for opt-in and subscriptions?

Consent you can showEach opt-in is logged with the caller's own mobile, the number they dialled and the exact time, which is cleaner evidence than a ticked box.

Easy for any customerWorks on a basic phone with no data, which matters for farmers, older customers and rural audiences.

Equally easy to stopA matching opt-out number lets people unsubscribe without replying STOP or contacting support.

How do you set up opt-in and subscriptions with a missed call number?

Publish the subscribe number with the terms"Give a missed call to get weekly mandi prices on SMS", stating what, how often and how to stop.
The customer callsThe call is rejected after a ring and the number is added to your subscriber list with a timestamp.
A confirmation goes outThe reply confirms the subscription, how often messages will come and the opt-out number.
Opt-outs are honoured automaticallyA call to the opt-out number removes the person, confirms it and updates your CRM by webhook.

Auto-reply templates for opt-in and subscriptions

Copy, edit and use these as a starting point.

Subscription confirmedAuto-reply SMS

You are subscribed to {#var#} updates from {#var#}, about {#var#} messages a month. To stop, give a missed call on {#var#}. -{#var#}

UnsubscribedAuto-reply SMS

You have been unsubscribed from {#var#} updates. You will not receive these messages again. To rejoin, call {#var#}. -{#var#}

WhatsApp opt-in confirmationAuto-reply WhatsApp

Hello, you asked to receive {{1}} on WhatsApp from {{2}}. Tap Yes to confirm. You can stop anytime by replying STOP.
[Yes, send updates] [No thanks]

Auto-replies go out by SMS (DLT template needed) or WhatsApp (approved template needed).

Which industries use Missed call for opt-in and subscriptions?

Retail storesHow do retail stores use missed call marketing?See how

Schools, colleges and coaching institutesHow do coaching institutes use missed calls for admissions?See how

Restaurants and cloud kitchensHow do restaurants use a missed call number?See how

Property management and housing societiesHow can a housing society use a missed call number?See how

D2C and e-commerce brandsHow do D2C brands use missed call numbers?See how

Small and medium businessesIs a missed call service worth it for a small business?See how

What are the best practices for opt-in and subscriptions?

Do this

State what, how often and how to stop next to the number
Send the first message only after the confirmation, and keep the promised frequency
Publish the opt-out number as prominently as the opt-in number
For WhatsApp marketing, add a confirm button so consent is explicit

What to measure

New opt-ins per week by source number
Opt-out rate after each campaign
Share of subscribers who click or buy within 90 days

Connect results to your CRM with the Missed call API and webhooks. See how pricing works.

Questions about Missed call opt-in and subscriptions

Is a missed call valid consent for promotional SMS?

A missed call to a clearly labelled subscribe number is a strong signal of consent, especially when the terms are shown next to it and confirmed in the reply. Under TRAI rules, DLT consent templates and the DPDP Act, keep the record and follow your operator's process for registering consent where required.

Can a missed call opt-in cover WhatsApp marketing?

It can start it. Send a WhatsApp template asking the person to confirm with a button, and record that reply as their opt-in. Meta expects businesses to get clear permission before sending marketing messages, so a two-step confirmation is the safer approach.

How do customers unsubscribe?

Give them a separate opt-out number, printed with the opt-in number and included in every message. Calling it removes them from the list automatically, sends a confirmation and posts the change to your CRM, so no further messages go out.

What records should we keep for DPDP compliance?

Keep the caller's number, the number they called, the date and time, the wording of what they agreed to and the confirmation sent. Keep opt-out records too. The MsgClub panel logs the call details, and the webhook lets you store them in your own system.

Can people subscribe to different lists?

Yes, by using a different number per list, for example daily mandi prices, weekly offers or exam updates. The number called tells your system which list to add them to, and each list can have its own confirmation message and opt-out number.

Does a subscriber on DND still get our messages?

A person on DND who has explicitly opted in to your messages can receive them where consent is recorded as TRAI's rules require. Without registered consent, promotional SMS will be blocked for DND numbers. Service messages related to their request follow the service categories.

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