bulk sms call

OTP is great, but it shouldn’t be your only form of user verification. Since we think missed-call verification is essential to your business, we’re going to break down what it is, how it works and, why, when combined with OTP it can save your money and win you verified leads.

What exactly is missed-call verification and how does it work?

Missed-call verification is an easy way to verify a mobile number through a missed call from the user’s phone. The concept is pretty simple – the users enter their phone number during the in-app verification process then will receive a number on their app screen and will make a call to that number in order to get the user verified.

What is 2 Factor Authentication via Missed Call?

An authentication factor which uses Missed/Dropped Call initiated from user’s registered phone. Dropped/Missed Call is a call which gets disconnected by dedicated phone number before getting answered. You can Authenticate users using Dropped/Missed Call service.

Advantages of 2 Factor Authentication via Missed Call.

  • Password-less Authentication.
  • Low operational cost.
  • Cheaper than OTP SMS Authentication.
  • Cheaper than OTP Voice Authentication.
  • Simple and secure HTTPS API based integration with your applications.

Most Commonly Used

  • Sign up Verification.
  • Leads Generation.
  • Transaction Authorization.
  • Member Account Verification.
  • Cash on Delivery (COD) shipments.


You need to avail dedicated missed call number.

Integrate our 2 Factor Authentication API.

API Work Flow

Our API handles all the authentication infrastructure. We have written a detailed documentation on 2 Factor Authentication via Missed Call which you can forward to your development team.

Step 1: Your user will appear on your login or registration page, fill your details then click on submit or login button.

Step 2: If the information given by the user is correct, then to verify the mobile number of the customer, a call has to be made on the given number like Screen – 2A.

Step 3: After the missed call, the user clicks on the “Done” button or after the time given on the timer ends, our web server will hit by passing the user number to our missed call API.

Step 4: 4 Our web server will get a response code after hitting the API.

  1. A) If our response code is 000. it means your user is authenticated
  2. B) If our response code is 001. This means your user is unauthenticated.

Step 5: If, you have received response code 000, then take your authenticated user for further transactions.

Note: Callback parameter is mandatory, the response will be forwarded to this URL whether customer dialled the missed call number or not.

API Document



Missed Call Received

<MissedCallReportController.MissedCallSmsResponse xmlns:i=”http://www.w3.org/2001/XMLSchema-instance” xmlns=”http://schemas.datacontract.org/2004/07/SmartTech.IMissedCall.Web.Controllers”>






Missed Call Not Received

<MissedCallReportController.MissedCallSmsResponse xmlns:i=”http://www.w3.org/2001/XMLSchema-instance” xmlns=”http://schemas.datacontract.org/2004/07/SmartTech.IMissedCall.Web.Controllers”>


<ErrorMessage>Not Received</ErrorMessage>





Parameter Information:
Parameter Name Description
channelNumber Flash on Screen Number
mobileNumber User’s mobile number
timeInterval Time given to the user to make a missed call (Second).


Abhinay Saxena
Abhinay Saxena
13 March 2023
I recently used the Fortius toll free number service and was extremely satisfied with the results. The customer service team was highly responsive and answered my call within one ring. They were very courteous and provided me with the information I needed in a prompt manner. I found their staff to be knowledgeable and professional throughout the entire process. The service provided was invaluable and I would certainly consider using them again in the future. Highly recommended!
Pranjal Srivastava
Pranjal Srivastava
11 March 2023
I recently used Fortius Infocom's Bulk SMS service and it was amazing! The user interface was very intuitive and user friendly. I found it very easy to get started and the process was smooth. The delivery of messages was fast and accurate. Overall, I had a great experience with the service and would definitely recommend it to others.
Komal Ks
Komal Ks
10 March 2023
I recently used a bulk SMS service for my business and I have to say that I'm really happy with the results. The service was efficient and easy to use, allowing me to send out messages quickly and easily. It was also very reliable, as the messages were always sent out on time. Overall, it was a great experience and I would definitely recommend this service to anyone looking for a way to quickly send out messages in bulk.
Akash Singh
Akash Singh
9 March 2023
I recently tried out a bulk SMS service and I was pleasantly surprised with the ease of use and the quality of the service. The customer support staff was incredibly helpful and responded to my queries quickly. The delivery rate of the messages was very good and I was able to reach out to a large number of people almost instantly. The interface was also easy to use and navigate, making it a breeze to send out my messages.
Abdul Rehman
Abdul Rehman
8 March 2023
I recently discovered Fortius Voice call service and I am so glad I did! The clarity of the calls is outstanding and it's the perfect solution for any business. Whether you're on a call with a client or a team member, the sound quality is exceptional. What's more, their competitive pricing makes it so easy to fit into any budget. I highly recommend this service and can't wait to see how it helps my business grow!
7 March 2023
I'm so glad I found Fortius Infocom for my business! Their toll-free number service is reliable and user-friendly. Their customer service team is always available to answer any questions I have, and they are very knowledgeable. I highly recommend their services to anyone looking for a reliable and affordable toll-free number service provider.
Adnan Ali
Adnan Ali
6 March 2023
I recently used Fortius Infocom's bulk SMS service and I was so impressed. They provided excellent service and support throughout the whole process, which made it a breeze. The turnaround time was really fast, and the quality of their products was top notch. I highly recommend this company for anyone who needs to send bulk SMS messages!
Shobhnath Keshri
Shobhnath Keshri
5 March 2023
I recently purchased a product from Fortius Infocom, and I am impressed with their customer service and support. The staff was very helpful in answering my questions and providing information on the product itself. They clearly had a thorough understanding of their products, which made me feel confident in my purchase. They also provided clear instructions on how to use the product, which made it easy to get started. Overall, I am very pleased with Fortius Infocom's support and services both were outstanding.
Praveen Srivastava
Praveen Srivastava
4 March 2023
I recently used Fortius Infocom for bulk SMS services and I'm extremely pleased with the results. The support team was incredibly helpful and knowledgeable every step of the way. I felt confident that my project was in safe hands. The entire process was seamless and the delivery of messages was prompt and accurate. Highly recommended!
3 March 2023
I recently hired Fortius Infocom for a bulk SMS campaign and I am really impressed with their services. They provided me with a quick response, reliable support and valuable advice. Their team was very professional and knowledgeable about the industry. I'm really happy with the results we got from the campaign. The process was smooth and easy to use. I would definitely recommend them to anyone looking for quality bulk SMS services in Lucknow!
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Fortius Infocom Private Limited
H. No. : 1st Floor 4/167 Vibhav Khand, Gomti Nagar
Uttar Pradesh 226010
Phone: +91-8114168888
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