What is OTP SMS, and How does it work?

An increasing number of Cyber threats encourage users to secure the platform. The need to enhance the security standards of your online applications has grown as a result of the rise in cyber security threats. You must guarantee the security of your users’ accounts.

Nowadays, several web apps on the internet encourage their customers to increase the security of their accounts. By enabling 2-factor authentication, they do this. TOTP (the Time-based One-Time Password algorithm) authentication is one of the strategies for establishing 2-factor authentication.

What it is, how to use it, and why are all covered on this page. But first, let’s quickly review what two-factor authentication is to understand that.

By the end of this article you can know about the OTP SMS and How does it Work? 

What is OTP SMS?

OTP SMS or One-Time-Password Short Message Service is a text message with a special alphanumeric or numeric code delivered to a mobile phone as part of the secure two-factor authentication process known as SMS OTP (one-time password) (MSISDN).

The receiver then logs into a service, website, or app using this code or password as an additional layer of protection.

When login into banks or any other financial services account, SMS OTP is becoming typical. In the UK and EU, new legislation that requires all banks to use Strong Customer Authentication (SCA) when signing in or completing a transaction went into force in March 2022.

Non-financial organizations are increasingly embracing SMS OTP as well to improve their security.

A one-time password (OTP) is delivered to the user’s phone along with the SMS text when using the SMS OTP authentication technique. The OTP is sent to the user, who then inputs it into the device used for authentication. 

The OTP has a time limit during which it must be utilized. OTPs sent via text texts guard against phishing and malicious attempts. It is advised to combine SMS OTP with other security measures, such as Password or LDAP Password.

Depending on the platform of the smartphone, a user can perform one of the following activities while authenticating on the same smartphone that receives SMS:


Tap the input area to reveal the OTP, which is automatically added to the clipboard and displayed above the keyboard.

Android versions 11 and up: 

In the SMS notice, choose Copy OTP. Next, select OTP from the input area that appears above the keyboard.

Android versions previous to 10: 

Copy the OTP by opening the SMS notification. To enter an OTP, tap the input area that is shown above the keyboard.

Period for an OTP:

An ideal Time Period for an OTP is in seconds. OTP is active only for a maximum of 360 seconds and a minimum of 120 seconds.

Within 2 to 5 minutes of delivery of OTP, it becomes inactive or if not used during the period of OTP. it is of no use then or inactive.

Free Bulk SMS Online service also helps small vendors or companies to grow their business in the market

There is generally a way to resend OTP once if you are late to enter the OTP on time or if users are slow to enter the OTP for the ist time.

Delayed messages could also be a problem. If the SMS is delayed to send then it could be the reason for it becoming inactive.

How does SMS OTP Verification work?

To receive the OTP you must register yourself through your registered Mobile Number. You have to give your registered number to the Business you want to log in for the sign-up process.

After entering the login details, you will get an SMS code.

Login to any app or website after entering the OTP SMS an OTP SMS ensures you with your registered mobile number and is secure from cyber threats.

Around 93% of overall enterprises use the OTP SMS service for the verification process.

Why use OTP SMS for verification?

One-Time-Password SMS or temporary Codes are two widely used methods for the verification process. 

Verification of users with registered mobile numbers with the use of One Time Password is sending Short Message Service has tremendous benefits and almost enterprises use this service.

Some major pros of using One Time Password Short Message Service or OTP SMS are given below:

1. Reduce Friction

Password-free logins can be provided via SMS OTP verification, freeing users from having to remember their passwords. After confirming the registration, the system will immediately provide a code to enable access.

2. User Data Validation

They may also be used on lead qualification processes to evaluate the accuracy and utility of the contact information in your database or to verify its legality.

3. Fraud prevention

You may use temporary codes in coupon campaigns to link emails to phone numbers and stop fraud, preventing the same person from taking advantage of a discount using numerous email addresses.

4. Increase Security

Before providing a temporary code to perform second identity verification, multi-factor authentication protocols ask the user for credentials such as their email address and password.


OTP SMS is the two-factor authentication process that ensures the user’s identity by sending a temporary code or One-Time-Password to his/her registered phone number.

This authentication process ensures the Business and the user from cyber fraud and attacks. To get the service for a Business you must connect with a service provider that works effectively And provides you with effective service conveniently. One-Time-Password SMS Service provider that permits the Businessman with the service must be convenient and effective.

Connect with a Trustworthy OTP SMS Service provider and grow your network and Businessman cyber threat free.

Also Read: What are the Benefits of SEO?

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I am a digital marketer, content writer, blogger and professional people-watcher. She has had a passion for writing since high school, and is deeply interested in the art of visual storytelling. She loves to express herself through her art, style and fashion. She loves to play practical jokes on her friends and family and make them laugh till their stomachs hurt.

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