How to Update Your Mobile Number in a Bank Account Online and Offline

Highlights

• Learn how to update the mobile number in the bank account through online and offline methods
• Learn how to update your bank account mobile number online through internet banking, mobile apps, and ATM services safely in 2026.
• Understand the complete bank account mobile number update process, including verification steps and expected processing time.
• Know why keeping your registered mobile number updated is important

Introduction

Your registered mobile number is one of the most important parts of your bank account. It helps you receive OTPs, transaction alerts, account notifications, and internet banking updates. If you change your phone number and forget to update it with your bank, you may face issues while using digital banking services.

Today, most banks in India allow customers to change their mobile numbers online. Some banks also provide offline methods through ATMs or branch visits. The process may vary slightly from one bank to another, but the basic steps remain similar.

Why Updating Your Mobile Number Is Important

Keeping your mobile number updated ensures uninterrupted access to banking, secure One-Time Password (OTP) verifications, and essential government services (like Aadhaar). An outdated number leaves you locked out of vital accounts and vulnerable to identity fraud, as unused numbers can eventually be reassigned to strangers.

Updating your phone number provides several specific, everyday benefits:

• Seamless Financial Transactions: Banks rely on active mobile numbers to send instant alerts for debits, credits, and suspicious activity. You also need the registered number to generate OTPs for digital payments.
• Digital Identity Security: Your mobile number acts as a primary recovery tool and security layer for online portals. If you get locked out of an account, password reset links and security codes are sent to your phone.
• Government & Utility Access: In India, an Aadhaar-linked mobile number is required to access government subsidies, file taxes, or track provident funds. Without the correct number, you lose the "master key" to these digital services.
• Preventing Fraud: Old or disconnected numbers can be reassigned to new owners. If you haven't updated your accounts, a stranger could intercept your two-factor authentication codes and access your sensitive data.

Change Mobile Number in Bank Account Online

To change your mobile number online, log in to your bank's official internet banking portal or mobile app. Navigate to the Profile, Settings, or Personal Details section, locate the option to update your mobile number, enter the new 10-digit number, and verify the request using an OTP.

While the exact interface varies by bank, standard online procedures are detailed below.

1. Through Internet Banking

Most major banks allow you to update your contact details securely via their web portal.

• Log In: Access your bank's official web portal (e.g., HDFC NetBanking or SBI Online) using your credentials.
• Navigate: Go to the 'Profile', 'My Accounts & Profile', or 'Settings' tab.
• Update: Select the option to 'Edit' or 'Change Mobile Number'.
• Verify: Type in your new mobile number and verify it using the One-Time Password (OTP) sent to your old and/or new phone number.

2. Through the Bank's Mobile App

You can perform the same action through your bank’s smartphone application.

• Open and log in to your bank's official mobile application.
• Open the main menu or click on your profile picture to access settings.
• Tap on Profile Management > Update Contact Details.
• Enter the new mobile number and authorise the change using an OTP or Debit Card PIN.

3. Alternative Digital Methods (e.g., SBI ATM)

Some institutions, such as the State Bank of India, allow you to submit a mobile number change request at an ATM if you have an active debit card, without needing to visit your home branch.

• Visit your nearest ATM and insert your debit card.
• Enter your PIN and select the Services or Registrations option.
• Choose Mobile Number Registration/Update and follow the on-screen prompts.

Update Phone Number in Bank Account Offline

Updating your phone number offline requires a branch visit or using an ATM. The easiest method is to visit your bank branch with your passbook and a self-attested ID proof (like Aadhaar or PAN) to fill out a contact update form.

Follow this step-by-step guide to complete the process:

Method 1: Visiting the Bank Branch

1. Locate your Branch: Visit your nearest or home branch.
2. Request the Form: Ask for the KYC Update or Mobile Number Change form.
3. Fill Out Details: Enter your account number and your new mobile number clearly.
4. Attach Documents: Provide a self-attested photocopy of your ID (e.g., Aadhaar, PAN, or Passport).
5. Submit: Hand the form to the representative. They may verify your original ID card.

Method 2: Using the Bank's ATM

Many major banks (such as SBI, HDFC, and Axis) allow you to update your number at their ATMs:

1. Insert your Debit Card and enter your 4-digit PIN.
2. Select the Services or Registrations option.
3. Choose Mobile Number Update or Registration.
4. Enter your new mobile number and confirm.

Documents Required to Update the Mobile Number in the Bank Account

To update your mobile number, you typically need a duly filled application form, a government-issued photo ID (like an Aadhaar or PAN card), and your bank passbook. The physical presence of your new SIM card is also required to verify an OTP.

Review these essential documents and step-by-step guidelines to ensure a smooth update process.

Core Documents Required

• Request Form: A "Mobile Number Change" or "KYC Update" form (available at the bank branch).
• Proof of Identity (POI): Self-attested photocopy of a government-issued photo ID such as your Aadhaar card, PAN card, Passport, Voter ID, or Driving License.
• Bank Account Proof: Your original bank passbook or a recent account statement to verify account ownership.
• Active Mobile Number: Your new SIM card must be active and inserted into a phone, as the bank will send a verification OTP during the process.

Bank Account Mobile Number Update Process: Important Things to Remember

Updating your bank account's mobile number is a critical process for account security. You can update your number via your bank's net banking, mobile app, an ATM, or a branch visit. Ensure you have your KYC documents, like an Aadhaar or PAN card, readily available. 

Important Things to Remember

• Keep the Old Number Active: Do not discard your old SIM card until the new number is fully activated, as the bank may send confirmation or verification OTPs to the existing number.
• Processing Time: Online and ATM updates typically reflect within 24 to 48 hours, while branch requests may take 2 to 3 working days.
• Beware of Fraud: Banks will never call you to ask for your One-Time Password (OTP), CVV, or PIN to update your mobile number. Always initiate the request through official channels.
• Update Linked Services: Remember to delink your old number from active UPI, e-wallets, or auto-debit services (like FASTag) to avoid transaction issues.
• KYC Compliance: Some banks may require you to refresh your KYC documents if they are outdated in their system.

Safety Tips While Updating Your Mobile Number

Cyber fraud cases involving fake banking calls and phishing links are increasing. Follow these precautions:

• Never share OTPs with anyone
• Use only official banking websites and apps
• Avoid public Wi-Fi while accessing internet banking
• Verify SMS alerts after updating your number
• Contact customer care immediately if you notice suspicious activity

The Reserve Bank of India regularly advises customers to stay alert against digital banking fraud and unauthorised access attempts.

Key Takeways

Keeping your registered mobile number updated is essential for secure and uninterrupted banking. It ensures smooth access to internet banking, UPI payments, OTP authentication, and transaction alerts. Fortunately, most banks in India now offer simple online and offline methods to complete the process.

Whether you choose internet banking, a mobile app, an ATM, or a branch visit, always use official banking channels and follow proper security practices. A small update today can help you avoid banking disruptions and security risks tomorrow.