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Two-Way SMS Campaigns: Register and Receive Information at Scale

Choose a new way of campaigning. Let people register with a missed call, reply to your SMS on a long code, and track who responded and when.

Missed call registrationLong code repliesAutomatic responsesResponse tracking
1 missed callTo register a participant
2-6 secTypical SMS delivery
99.9%Uptime SLA
10,000+Registered businesses

Quick Answer

A two-way SMS campaign lets people reply to an SMS you sent, so you can register participants and collect information instead of only broadcasting. With SMSGatewayHub, a participant gives a missed call to register, receives an automatic SMS asking for details, and replies on a long code; every reply is tracked so you know who responded and when.

What is a two-way SMS campaign?

Most SMS campaigns are one-way: you send, customers read. SMSGatewayHub's two-way campaign lets people reply to your previously sent SMS, making it one of the best channels to register and receive information from interested customers at scale.

The campaign combines three inbound tools: a missed call number for instant registration, automatic SMS responses, and a long code on which participants send back their details. Follow up on responses easily and track who has responded and when.

It works for event sign-ups, lead capture from ads, contest entries, admissions enquiries and any campaign where you need data from a large group of people rather than just clicks.

Life cycle of a two-way campaign

From first alert to completed registration in five simple stages.

  1. SMS alert is sent to you

    Participants receive an SMS inviting them to take part in an event or offer by responding to the text message.

  2. You give a missed call

    The participant gives a single missed call on the campaign number to register. No call charges, no typing.

  3. Automatic response

    An automatic SMS goes back asking the registered user for their personal details.

  4. You reply to that response

    The participant sends their details by SMS to the given long code, and the data is captured against their number.

  5. Reach your destination

    Your campaign now holds a verified list of interested people with their details, ready for follow-up.

Why run your campaign two-way?

Verified participants

Every registration comes from a real mobile number that gave a missed call or sent an SMS.

Structured data capture

Collect names, cities or preferences through keyword replies on a dedicated long code or shared keyword.

Track who responded

See who responded and when in live reports, and push responses to your CRM by webhook.

Easy follow-up

Send targeted follow-ups only to those who engaged, using transactional SMS or promotional routes as appropriate.

Which inbound channel should power your campaign?

ChannelBest forPricing page
Missed call numberOne-tap registration and opt-inMissed call pricing
Shared long codeKeyword replies on a budgetLong code pricing
Dedicated long codeHigh-volume, unlimited keywordsDedicated long code pricing
Short code 56161Contests and TV votingShort code pricing

See each pricing page for current plans.

Extending two-way campaigns to WhatsApp and voice

If your audience lives on WhatsApp, the missed call to WhatsApp auto reply feature opens a chat with your brand after a single missed call, and the WhatsApp Business API supports rich two-way conversations. For campaigns that need a voice helpline, add a toll-free number.

Outbound SMS in your campaign must follow TRAI DLT rules on headers and templates. SMSGatewayHub is TRAI DLT registered and can guide you through DLT registration. For more on running compliant two-way SMS, read our guide to TRAI DLT-compliant two-way SMS.

Frequently Asked Questions

A two-way SMS campaign lets recipients reply to the SMS you sent, so you can register participants and collect information instead of only broadcasting. SMSGatewayHub combines missed calls, automatic SMS responses and long code replies to run these campaigns.

The participant gives a single missed call on the campaign number to register. They then receive an automatic SMS asking for their details and reply with them on the given long code.

Yes. SMSGatewayHub tracks who has responded and when, shows it in live reports, and can push each response to your server through a webhook for follow-up.

You need an inbound channel such as a missed call number, a shared or dedicated long code, or short code 56161, plus a DLT-registered header and template for the outbound SMS. SMSGatewayHub can set up all of these.

Yes. SMSGatewayHub's missed call to WhatsApp auto reply opens a WhatsApp chat with your brand after a missed call, and the WhatsApp Business API supports full two-way conversations.

They suit event organisers, educational institutions, retailers, media brands running contests and any business collecting registrations or leads from a large audience.

Launch your two-way campaign

Register participants with a missed call and collect their details by SMS. Try it now with SMSGatewayHub or call 1800 102 1822.