Your registered mobile number is an important link between you and your bank. It is commonly used for transaction alerts, OTPs, mobile banking, UPI registration, security notifications and account-related communication. 

If you have changed your phone number, lost access to your old SIM or noticed that an outdated number is still registered with your account, you should update it through your bank’s official channels. 

If no mobile number is currently registered with your account, the process may be referred to as linking a mobile number with your bank account. If you are replacing an existing number, it is generally referred to as updating or changing the registered mobile number. 

The exact process for how to update mobile number in bank account varies by bank. Some banks allow eligible customers to complete the request through Internet Banking, mobile banking or an ATM, while others may require a branch visit. 

Note: Updating your registered mobile number does not change your bank account number, IFSC, account ownership or other core account details. 

Why Should You Change Your Mobile Number in Bank Account? 

Keeping your registered mobile number updated is important for both security and convenient access to banking services. 

Receive OTPs and Authentication Messages 

Banks frequently use the registered mobile number to send OTPs for transactions, login verification and certain service requests. 

If you no longer have access to the registered number, you may face difficulty completing these activities. 

Get Real-Time Transaction Alerts 

SMS alerts can help you track: 

  • Debit transactions 
  • Credit transactions 
  • ATM withdrawals 
  • Card transactions 
  • Fund transfers 
  • Other account activity 

Receiving these alerts promptly can also help you identify unauthorised activity. 

Use UPI and Mobile Banking 

Your registered mobile number may be required when registering for or using services such as: 

  • UPI 
  • Mobile banking 
  • Internet banking 
  • Certain card services 

This is why knowing how to link mobile number with bank account is important when setting up digital banking. 

Complete Service Requests 

Banks may use your registered mobile number to authenticate requests relating to passwords, account services, cards or other banking facilities. 

Improve Account Security 

If your old mobile number has been deactivated, reassigned or lost, leaving it linked to your bank account can create a security risk. 

Updating your details ensures that important OTPs and account alerts continue to reach you. 

Documents Required to Change Mobile Number in Bank Account 

The documents required depend on your bank and the method used to submit the request. 

For an online update, you may not need to upload physical documents if the bank can authenticate you through its existing digital banking process. 

For a branch-based request, the bank may ask for: 

  • Mobile number update/request form 
  • Bank account details or Customer ID 
  • Valid KYC/identity proof, where required 
  • Aadhaar, PAN or another accepted identity document, depending on the bank’s process 
  • Passbook or other account-related information, if requested 
  • Your new mobile number 

Carry original documents if your bank requires them for verification. 

Some banks may also ask you to verify your existing registered number or complete additional authentication before accepting the change. 

How to Change Mobile Number in Bank Account Online? 

Whether you can change your registered number completely online depends on your bank. 

If your bank provides an online mobile-number update facility, the process may broadly look like this: 

Step 1: Log in to Internet or Mobile Banking 

Visit your bank’s official website or open its official mobile banking app. 

Enter your authorised login credentials. 

Step 2: Go to Profile or Personal Details 

Look for options such as: 

  • Profile 
  • Personal Details 
  • Contact Details 
  • Service Requests 
  • Settings 

The wording differs across banks. 

Step 3: Select the Mobile Number Update Option 

Choose the option for changing or updating your registered mobile number. 

Enter the new number carefully. 

Step 4: Complete Identity Verification 

Banks use authentication controls to prevent unauthorised changes to registered contact details. 

Depending on the bank, verification may involve: 

  • OTP sent to the existing registered number 
  • OTP or verification on the new number 
  • Internet Banking credentials 
  • Debit card details 
  • ATM PIN 
  • Security authentication 
  • A bank-specific verification process 

Step 5: Confirm Your New Mobile Number 

Re-enter or review the new number before submitting the request. 

A wrong number can prevent you from receiving OTPs and account alerts. 

Step 6: Submit the Request 

Confirm and submit the mobile-number change request. 

Step 7: Check the Update Status 

The bank may send confirmation through: 

  • SMS 
  • Email 
  • Internet or mobile banking notification 

Processing time varies depending on the bank and the method used. 

Once the new number is registered, future OTPs, alerts and other applicable communication should be sent to the updated number. 

How to Change Mobile Number in Bank Account Offline? 

If your bank does not permit an online update, if you no longer have access to your old registered number, or if digital verification fails, you may need to visit a branch. 

A typical branch process involves: 

  1. Visit the required bank branch. Some banks may allow any branch, while others may ask you to visit your home branch. 
  1. Ask for the mobile number update form. 
  1. Enter your account and customer details. 
  1. Provide your new mobile number. 
  1. Submit the KYC or identity proof requested by the bank. 
  1. Sign and submit the request form. 
  1. Complete any additional verification required by the bank. 
  1. Wait for confirmation that your registered number has been updated. 

The bank may send an alert to your existing number, email address or new number when the request is initiated or completed. 

Alternate Ways to Update Your Mobile Number 

Depending on your bank, other channels may also be available. 

ATM 

Some banks allow customers to initiate a mobile-number update through their ATMs. 

A typical process may involve: 

  1. Insert your debit card. 
  1. Enter your ATM PIN. 
  1. Select Registration, Services or a similar option. 
  1. Choose Mobile Number Registration/Update. 
  1. Enter the existing and new mobile numbers where requested. 
  1. Complete the bank’s verification procedure. 

Not all banks offer this facility. 

Customer Care 

Customer care can tell you which mobile-number update channels your bank supports and what verification is required. 

However, do not assume that a customer-care executive can change your registered number merely on the basis of a phone call. For security reasons, the bank may redirect you to Internet Banking, an ATM or a branch. 

Bank-Wise Steps to Change Mobile Number in Bank Account 

The mobile-number change process is not identical across banks. Here are examples of how different banks currently handle the request. 

State Bank of India (SBI) 

SBI provides multiple ways to update a registered mobile number. 

Through Internet Banking 

  1. Log in to SBI Internet Banking. 
  1. Go to My Accounts & Profile. 
  1. Select Profile/Personal Details. 
  1. Choose Change Mobile Number. 
  1. Select the relevant account. 
  1. Enter the new mobile number. 
  1. Submit the request. 
  1. Complete the applicable authentication process. 
  1. Check the status communicated by SBI. 

SBI also provides a mobile-number update facility through eligible ATMs. 

Through SBI ATM 

  1. Insert your debit card. 
  1. Select Registration. 
  1. Enter the ATM PIN. 
  1. Select Mobile Number Registration. 
  1. Choose Change Mobile Number. 
  1. Enter and confirm the old number. 
  1. Enter and confirm the new number. 
  1. Complete SBI’s OTP/reference-number verification process. 

You can also submit a mobile-number update request at an SBI branch. 

YES BANK 

YES BANK currently directs retail customers to visit a branch for changing the registered mobile number. 

The process generally involves: 

  1. Visit a YES BANK branch. 
  1. Carry your account details and applicable KYC documents. 
  1. Fill in the mobile-number change request. 
  1. Provide the new number. 
  1. Submit the request to the branch. 
  1. Complete the bank’s verification process. 
  1. Wait for confirmation of the update. 

YES BANK states that alerts may be sent to the existing registered mobile number/email address and the newly updated number during the process. 

Bank of Baroda 

For resident customers, Bank of Baroda’s current guidance provides a branch-based route for updating the mobile number. 

  1. Visit your home branch. 
  1. Ask for the mobile-number update form. 
  1. Enter the required account and contact details. 
  1. Submit valid KYC/ID proof along with the request. 
  1. The bank verifies the submitted information. 
  1. The registered mobile number is updated after successful processing. 

Bank of Baroda also provides separate remote/online options for eligible NRI customers. 

Other Banks 

Other banks may support: 

  • Internet Banking 
  • Mobile banking 
  • ATM-based updates 
  • Branch requests 
  • Assisted service channels 

Always check the bank’s official website, app or customer-care service before starting the process. 

How to Link Mobile Number With Bank Account 

If your account does not have a registered mobile number, you may need to link mobile number to bank account instead of replacing an existing number. 

Depending on your bank, you may be able to register a number through: 

  • A branch 
  • Internet Banking 
  • Mobile banking 
  • An ATM 
  • Another bank-approved channel 

You will usually need to authenticate your identity and confirm the number before the bank links it to your account. 

After successful registration, the number can be used for applicable services such as transaction alerts, OTPs, digital banking and UPI. 

Important Tips to Keep in Mind 

When changing or linking your mobile number: 

  • Use only official bank websites, apps, ATMs and branches. 
  • Never share your OTP, ATM PIN, UPI PIN, Internet Banking password or card PIN with anyone. 
  • Keep your old mobile number active until the change is completed, where possible. 
  • Enter the new number carefully before submitting the request. 
  • Carry applicable KYC or identity documents when visiting a branch. 
  • If you have lost access to your old number, inform your bank and ask for the appropriate alternative verification process. 
  • Check whether the update needs to be completed separately for any linked products or services. 
  • Confirm that alerts and OTPs are reaching the new number once the update is completed. 
  • Banks may request KYC verification when processing changes to customer contact details. 

Following these steps can make the mobile number change in bank account process safer and more convenient. 

Why Updating Your Mobile Number Matters for Financial Services 

Your registered mobile number is important beyond everyday banking. 

It may also be used when accessing financial services, completing identity verification, receiving OTPs and managing repayment-related communication. 

For example, when applying for a personal loan online, a valid mobile number can form part of the registration and verification journey. 

With Fibe, eligible customers can access personal loans of up to ₹10 lakh, subject to applicable eligibility, verification and lender terms. 

Download the Fibe App or visit the official Fibe website to check your eligibility. 

FAQs On Changing Mobile Number in Bank Account 

1. How Many Days Does It Take to Change a Mobile Number in a Bank Account? 

The processing time depends on your bank and the method used. 

Some digital or ATM-based requests may be processed relatively quickly, while branch-based requests can take longer because of verification requirements. 

Check the confirmation or service-request timeline provided by your bank rather than assuming a standard processing period applies to every bank. 

2. Can We Change Mobile Number in Bank Account Online? 

It depends on the bank. 

Some banks offer a mobile-number change facility through Internet Banking or other digital channels, while others require customers to visit a branch. 

For example, SBI provides an Internet Banking route, while YES BANK’s current retail process directs customers to a branch. 

3. Can I Change My Bank Account Phone Number Online? 

You may be able to, if your bank provides the facility and you can complete its required authentication. 

Log in to your bank’s official Internet or mobile banking service and check Profile, Personal Details, Contact Details or Service Requests. 

If no mobile-number update option appears, contact the bank or visit the required branch. 

4. Will I Get Confirmation After the Update? 

Banks generally provide confirmation or a status update after processing a mobile-number change request. 

Depending on the bank, this may be sent through SMS, email, Internet Banking or another official communication channel. 

5. Is There Any Fee for Changing My Mobile Number? 

This depends on the bank and the service channel. 

Many banks may not charge for updating customer contact details, but you should check your bank’s current schedule of charges rather than assuming the service is universally free. 

6. What Documents Are Required to Change Mobile Number in Bank Account? 

The exact requirements vary by bank. 

For a branch request, you may need: 

  • Mobile-number change form 
  • Account details or Customer ID 
  • Valid KYC/identity proof 
  • Aadhaar, PAN or another accepted document where required 

For an online update, separate physical documents may not be required if the bank can authenticate your request digitally. 

7. Can I Change My Bank Mobile Number If I Have Lost My Old Number? 

Yes, but you may need to use an alternative verification route. 

If the old number is unavailable, contact your bank immediately. Depending on the bank, you may need to: 

  • Visit a branch 
  • Provide KYC/identity documents 
  • Complete additional verification 
  • Submit a signed request 

Do not delay the update if your old SIM has been lost, stolen or permanently deactivated. 

8. How to Change Mobile Number in Bank Account Without Visiting a Branch? 

This depends entirely on whether your bank supports a remote update process. 

Possible methods include: 

  • Internet Banking 
  • Mobile banking 
  • ATM 
  • Another bank-approved digital service 

For example, SBI offers Internet Banking and ATM routes. However, some banks still require a branch visit for retail mobile-number changes. 

Always check your bank’s official process before attempting the update.