Quick Answer
Missed call OTP verifies a phone number without sending a code. The user calls a number shown in your app from the mobile being verified; the call is detected and cut before it connects, and the caller ID is matched to the session. SMSGatewayHub offers this through a simple API, free for the caller, with no SMS wait, no DLT template and SMS OTP fallback.
What is missed call OTP and how is it different from SMS OTP?
Both confirm that a user controls a mobile number. They differ in who sends what, and in which rules apply.
| Missed call OTP | SMS OTP | Voice OTP |
|---|
| How it works | User calls a number shown on screen; the call is cut and the caller ID is matched | A code is sent by SMS and typed in (or auto-read) | A code is read out in an automated call |
| User effort | One tap to call, nothing to type | Wait, read and type the code | Answer, listen and type the code |
| Cost to the user | None, the call never connects | None | None |
| DLT template needed | No, no SMS is sent | Yes, transactional (-T) template with typed variables | Depends on the voice route used |
| Best for | Sign-up, lead and COD confirmation, low-literacy users | Logins, payments and any flow needing a code | Fallback for users who cannot read SMS |
Need codes rather than number confirmation? Use our OTP SMS service or the enterprise OTP API over SMS, voice and WhatsApp.
Why are businesses adding missed call verification now?
Tighter SMS rules and user impatience have made a no-code verification option more useful than ever.
No DLT template to maintain
SMS OTP templates must now use typed variables such as {#numeric#} and carry a -T header. Missed call verification sends no SMS, so there is no template, header or scrubbing step to fail.
No delivery wait
Network congestion and handset spam filters can delay SMS codes. A missed call is detected the moment it rings, so the user is not left waiting for a code.
One tap on mobile
On a phone, a tap on the number opens the dialler. No switching between apps, copying codes or mistyped digits.
A second path when SMS fails
Offer missed call as a fallback when a user reports that the SMS code has not arrived, and keep SMS OTP as the default where you need a code. Why OTPs go missing
Why SMSGatewayHub
Why choose SMSGatewayHub over other missed call OTP providers?
Verification sits on your sign-up path, so it has to be fast, always on and easy to back up with another channel.
Free for your users
Calls disconnect automatically before they connect, so the person verifying pays nothing for the call.
Simple API, instant setup
Request a verification, show the number, read the result. Developer docs and samples are on our developer API page.
SMS OTP fallback, same account
Switch any user to SMS OTP on transactional routes and pay only for delivered SMS. Delivery-based billing
Certified security
ISO 27001, ISO 9001:2015, SOC 2 and VAPT tested infrastructure. Trust Center
Real-time dashboard
Every verification attempt is logged and trackable, so you have an audit trail of which number verified and when.
Trusted since 2009
10,000+ registered businesses and 2,000+ enterprise clients, a 99.9% uptime SLA and a toll-free sales line, 1800 102 1822.
| Question to ask any missed call OTP provider | SMSGatewayHub |
|---|
| Does the user pay for the verification call? | No. The call is cut before it connects. |
| Do I need a DLT template for missed call verification? | No. No SMS is sent, so no template is involved. |
| What if the user cannot place a call? | Fall back to SMS OTP, voice OTP or WhatsApp from the same account. OTP SMS service |
| Can I see a log of every verification? | Yes, attempts are tracked on a real-time dashboard. |
| Which security certifications do you hold? | ISO 27001, ISO 9001:2015, SOC 2 and VAPT tested. |
Already running missed call campaigns? See missed call services for lead capture and missed call to WhatsApp auto reply.
Missed call verification use cases by industry
Each card links to a dedicated industry page with more ideas for your sector.
E-commerce & D2C
Confirm cash-on-delivery orders and verify new sign-ups before the first purchase. Bulk SMS for e-commerce
Banks, NBFCs & fintech
Verify the mobile number on loan and account applications before the KYC step; keep SMS OTP for payments. Bulk SMS for banks & NBFCs
Hospitals & clinics
Confirm patient numbers when booking appointments so reminders reach the right phone. Bulk SMS for hospitals
Schools & EdTech
Verify parent and student numbers during admission enquiries and app sign-up. Bulk SMS for education
Logistics & courier
Confirm delivery addresses and reschedule requests with a single ring from the customer. Bulk SMS for logistics
Missed call OTP flows you can build
Typical flows and what happens at each end. All of them complete without the user typing a code.
| Flow | What the user does | What your system does next |
|---|
| App or website sign-up | Taps the number shown on the sign-up screen and the call cuts | Marks the number verified and continues sign-up |
| COD order confirmation | Gives a missed call to the number in the order SMS | Marks the order confirmed for dispatch; sends a confirmation transactional SMS |
| Lead verification from ads | Fills a form, then rings the number to confirm | Pushes the verified lead to your dashboard or CRM |
| Profile number change | Calls from the new number to confirm it | Updates the contact number on the account |
| Fallback after a missing SMS code | Chooses 'verify by missed call instead' | Completes verification without resending the SMS OTP |
The call must come from the number being verified, so on dual-SIM phones ask users to call from the SIM they entered. Learn more in our blog on phone number verification without OTP.
How to start with missed call OTP
Create your account
Register free and ask our team to enable missed call verification.
Get your verification number
We assign the virtual number your users will call; setup is instant.
Integrate the API
Start a verification from your app, show the number, and read the verified result. See the developer API docs.
Add SMS OTP fallback
Register a transactional OTP template so users who cannot call can verify by SMS OTP. Our team helps with DLT registration.
Track and optimise
Watch verification attempts on the dashboard and compare completion rates against SMS OTP.
Missed call OTP resource map
Everything related to missed call verification on SMSGatewayHub, grouped by what you need to do next.
Missed call OTP vs SMS OTP: which do you need?
Use missed call OTP when the goal is to confirm that a user owns a mobile number: sign-ups, lead forms, COD confirmation and profile updates. It removes typing and SMS waiting, costs the caller nothing and needs no DLT template. Use SMS OTP when you need a one-time code tied to a specific action, such as a login, a payment or a password reset, or when the user cannot place a call.
Most businesses run both: missed call as the quick path for number confirmation, SMS OTP on transactional -T routes for logins and payments, and voice or WhatsApp as fallback through the enterprise OTP API. For marketing-led missed call campaigns, see missed call services, and read automation with SMS, RCS, IVR, missed call and toll-free.
Frequently Asked Questions
What is missed call OTP?
Missed call OTP verifies a phone number without sending a code. The user calls a number shown in your app or website, the call is cut automatically, and the caller ID confirms they own the number. SMSGatewayHub provides this through a simple API.
How does missed call verification work?
Your app starts a verification and shows the user a number to call. The user dials it from the mobile being verified, the call is detected and disconnected before it connects, and your system receives the verified result. The whole flow takes one tap and no typing.
Does the user pay for the missed call?
No. The call is disconnected before it connects, so the caller is not charged. This makes SMSGatewayHub missed call OTP a free verification step for your users.
Do I need DLT registration for missed call OTP?
No DLT template is needed for missed call verification itself, because no SMS is sent. You do need DLT registration if you also send SMS OTPs or confirmation SMS, which SMSGatewayHub can guide you through.
Is missed call OTP as secure as SMS OTP?
Missed call verification confirms possession of a number, which suits sign-ups, leads and COD confirmation. For logins, payments and other sensitive actions, use an SMS OTP tied to that action. SMSGatewayHub lets you run both on one account.
What if a user cannot make a call?
Offer SMS OTP, voice OTP or WhatsApp as an alternative. SMSGatewayHub supports all of them from the same account, so you can switch channels without another integration.
How much does missed call OTP cost with SMSGatewayHub?
SMSGatewayHub uses Pay As You Go pricing with no cost to the caller; exact rates depend on volume and setup, see https://www.smsgatewayhub.com/missed-call-pricing or talk to sales on 1800 102 1822.
Verify numbers with one missed call
Create a free account, get your verification number and go live with a simple API, with SMS OTP fallback on the same account.