How To Link Mobile Number With Bank Account

Linking your mobile number with your bank account has become essential in today's digital era. It not only streamlines your banking operations but also enhances your security and access to various banking services. However, many people often find themselves confused about the task, either due to lack of clarity about the process or fear of potential hassles. This guide is here to ease your worries and provide you with a comprehensive guide on how to link mobile numbers with bank accounts. 

Significance of mobile number linkage with bank account

In this online life, the importance of linking your mobile number with your bank account cannot be overstated. It allows for better communication, increases security and facilitates seamless online transactions. Let's dive deeper into why mobile number linkage is crucial:

Enhanced communication & notifications:

Banks use your mobile number to send crucial alerts like transaction notifications, balance updates, and information about new offers. These SMS alerts keep you updated about your account activities and offer a sense of control over your finances.

Better security & fraud detection: 

With your mobile number linked to your bank account, you'll receive instant alerts for suspicious activities. It helps detect frauds and unauthorised transactions early, ensuring your hard-earned money stays safe.

Facilitating online banking & digital transactions: 

Your linked mobile number acts as a vital key in online banking. Be it fund transfers, bill payments or account management, your mobile number plays a crucial role in confirming and validating these transactions.

Must Read: Things You Should Know For Digital Bank Account

Traditional approach to linking mobile numbers with bank account

Traditionally, there are two main ways to link your mobile number with your bank account: visiting your bank in person or through an ATM. Both these methods, while reliable, may pose certain challenges, especially in the current times where digital solutions are preferred.

In-Person visit to the bank

The most traditional method of linking your mobile number is by visiting your bank branch. Here's how it's done:

  • Obtain a 'Change of Mobile Number' form from the bank.
  • Fill up the required details and submit it along with the necessary ID proof.
  • The bank will process your request, and your mobile number will be linked within a few working days.

Through an ATM

Many banks also allow you to link your mobile number via ATM. The process typically involves the following steps:

  • Insert your ATM card and enter your PIN.
  • Navigate to 'Services' or 'Registration' on the ATM screen.
  • Enter your mobile number and confirm it.

While these traditional methods are tried and tested, they can often be time-consuming and require physical presence, which may not be feasible for all, especially in today's busy world.

Leveraging digital platforms for effortless linkage

The rise of digital banking has paved the way for more straightforward and convenient processes. If you're wondering how to link mobile number to bank account online, internet banking and mobile banking apps are your answers. These platforms offer an easy and quick solution to link your mobile number from the comfort of your home.

Internet banking

With internet banking, you can link your mobile number in just a few clicks:

  • Log in to your internet banking portal with your user ID and password.
  • Navigate to 'Personal Details' or 'Update Contact Details'.
  • Enter your new mobile number and follow the prompts to complete the process.

Mobile banking apps

Mobile banking apps have emerged as a popular choice for the tech-savvy generation. They offer an easy-to-navigate interface and a simple process for mobile number link to bank account online:

  • Log in to your mobile banking app.
  • Go to 'Profile' or 'Settings'.
  • Choose 'Update Contact Details' and enter your new mobile number.
  • Follow the steps to verify and confirm the change.

Kotak811's approach to digital banking

Modern-day banking is shifting towards digital solutions, and Kotak811 is leading the way with its diverse offerings. The process to link mobile number to bank account online through Kotak811 is simple, convenient, and user-friendly.

  • Download and open the Kotak811 app on your mobile.
  • Log in using your CRN and MPIN.
  • Navigate to 'Service Request' -> 'Profile' -> 'Update Contact Details'.
  • Update your mobile number and confirm the changes.

This process doesn't require any paperwork or a visit to the bank branch, making it a hassle-free solution.

Kotak811 also offers a free bank account opening process and a zero balance account, making it an ideal choice for today's digital customers. For doing this, customers need to verify and link the mobile number on their Aadhar Card before doing anything else. 

Post-Linkage: Utilising the linked mobile number for banking

Once your mobile number is linked to your bank account, it's time to enjoy the benefits. Here's how you can utilise your linked mobile number for efficient banking:

  • Stay updated with SMS alerts for all transactions.
  • Use your mobile number as a secondary authentication for online transactions.
  • Be in the know about your bank's latest offers and services.

Safeguarding your linked mobile number

While linking your mobile number to your bank account offers numerous benefits, it's also crucial to safeguard your number from potential threats. Never share your OTPs with anyone and be wary of suspicious calls or messages asking for your bank details.

  • If you receive any suspicious calls or messages, report them to your bank immediately.
  • If your mobile number changes or if your phone is lost/stolen, inform your bank at the earliest to prevent potential misuse.

Must Read: What is a Banking App?

Understanding the role of OTPs in secure banking with linked mobile numbers

Once your mobile number link to bank account, you'll regularly encounter One-Time Passwords (OTPs) in your banking transactions. OTPs are temporary passwords sent to your registered mobile number for authenticating various banking operations. It adds an extra layer of security, ensuring that only you can access your account.
Here's how OTPs enhance your banking experience:

Security layer

OTPs are only valid for a short duration, usually a few minutes. Even if someone gets hold of your OTP, they can't misuse it after the validity period.


Be it fund transfer, changing personal details or registering for a new service, OTPs validate your identity. The bank permits the transaction or changes only after entering the correct OTP.

Fraud prevention

With OTPs, you are alerted instantly about any unauthorised transaction attempt. If you receive an OTP without initiating a transaction, it could signal a potential fraud attempt.

However, it's vital to maintain OTP confidentiality. Never share your OTPs with anyone, even if they claim to be from the bank. Remember, banks never ask for your OTP over calls or messages. So, safeguard your OTPs to make the most of your mobile number linkage for a bank account application.


In summary, linking your mobile number to your bank account is a necessary step towards convenient and secure banking. While traditional methods are still viable, digital platforms offer a more straightforward and hassle-free process. It not only keeps you updated about your banking activities but also acts as an extra layer of security. So, embrace this digital shift and take the necessary steps to link your mobile number with your bank account today.