Keeping your contact details updated in your Demat account is essential for security and smooth account operations. Your registered mobile number is used for receiving OTP verification, transaction alerts, and important notifications from your broker.

If your mobile number changes or you lose access to the registered number, you must update it in your Demat account as soon as possible. Updating your mobile number ensures that you continue receiving account alerts and maintain secure access to your investments.

In this guide, we explain how to update mobile number in a Demat account, the documents required, and the step-by-step process used by most brokers in India.

If you are new to stock market investing, you can first read our beginner guide on How to Start Investing in Stock Market in India.

What is a Demat Account?

A Demat account is used to store shares and securities in electronic format. Instead of holding physical share certificates, all investments are stored digitally in your account.

It works similar to a bank account.

Whenever you buy shares in the stock market, they are credited to your Demat account.

If you want to understand this concept in detail, you can read our guide on What is a Demat Account (Complete Guide).

Why Updating Mobile Number in Demat Account is Important

Your registered mobile number is a critical part of your Demat account security.

Here are the main reasons why you should keep it updated.

Without a correct mobile number, you may miss important notifications related to your investments.

When Should You Update Your Mobile Number?

Investors usually update their registered mobile number in the following situations:

• Changing to a new phone number
• Losing access to the old number
• Updating contact information
• Improving account security

Updating your mobile number ensures that your broker can contact you whenever necessary.

Methods to Update Mobile Number in Demat Account

There are multiple ways to update your registered mobile number depending on your broker.

1. Update Mobile Number Online

Many modern brokers allow investors to update contact details through their mobile app or website.

Steps usually include:

1. Login to your trading account
2. Open profile settings
3. Select contact information
4. Enter the new mobile number
5. Verify using OTP

This is the fastest method and usually takes only a few minutes.

2. Submit a KYC Modification Form

Some brokers require investors to submit a KYC modification form to update personal details.

The form includes:

• Demat account number
• PAN details
• New mobile number

Once submitted, the broker processes the request and updates your information.

3. Contact Broker Customer Support

If online updates are not available, you can request a mobile number update through customer support.

The broker may ask for identity verification before processing the change.

Step-by-Step Process to Update Mobile Number in Demat Account

Although the exact steps vary slightly between brokers, the general process is similar across platforms.

Step 1: Log in to Your Broker Account

Visit your broker’s website or mobile application and log in using your registered credentials.

If your account has been inactive for a long time, you may need to follow the process explained in How to Reactivate an Inactive Demat Account in India.

Step 2: Go to Profile or Account Settings

Once logged in, navigate to the profile or account settings section where personal details are stored.

You will find information such as:

• Mobile number
• Email address
• Address
• Bank details

Step 3: Enter the New Mobile Number

Replace the old mobile number with your new number.

Make sure the number is active because you will receive an OTP for verification.

Step 4: Complete OTP Verification

Most brokers verify the change through OTP authentication.

Step 5: Confirmation of Update

After verification, your broker will update the mobile number in your account.

You will receive a confirmation message once the update is complete.

Documents Required to Update Mobile Number

In most cases, updating the mobile number online does not require additional documents.

However, if you submit a manual request, you may need to provide:

How Long Does It Take to Update Mobile Number?

The processing time depends on the method used.

Once updated, all alerts and OTPs will be sent to the new mobile number.

Can You Update Mobile Number Without the Old Number?

Yes, it is possible to update your mobile number even if you no longer have access to the old number.

You can verify your identity using:

• PAN card
• Aadhaar card
• Email verification

After identity verification, your broker can update the mobile number in your Demat account.

Other Details You Should Keep Updated

Apart from your mobile number, you should also ensure that the following details remain updated.

• Email address
• Bank account details
• Residential address
• Nominee information

Updating contact details helps maintain the security and functionality of your account.

You can also follow similar steps described in How to Update Email ID in Demat Account.

Common Problems While Updating Mobile Number

Some investors face issues while updating their contact information.

Here are some common problems and solutions.

If the problem continues, contacting broker support is recommended.

Security Tips for Demat Account

Your Demat account contains valuable financial assets, so keeping it secure is extremely important.

Follow these basic security tips:

✔ Never share OTP with anyone
✔ Enable two-factor authentication
✔ Regularly check account alerts
✔ Keep your mobile number updated

These precautions help protect your investments from unauthorized access.

Final Thoughts

Updating your mobile number in a Demat account is a simple but important process that ensures uninterrupted access to your investment account. Since mobile numbers are used for OTP verification and transaction alerts, keeping them updated improves both convenience and security.

Most brokers today allow investors to update their mobile numbers online through their mobile apps or websites. If online updates are not available, you can submit a KYC modification request or contact customer support.

Keeping your contact information updated is an essential step toward maintaining a secure and well-managed investment account.

If you are planning to start investing soon, you can also explore our guide on Best Demat Account for Beginners in India.

Frequently Asked Questions

Can I update my mobile number in a Demat account online?

Yes. Most brokers allow investors to update their mobile number online through their website or mobile app.

Is there a fee for updating a mobile number in a Demat account?

No. Updating contact details like mobile numbers is usually free.

How long does it take to update the mobile number?

Online updates are usually processed instantly, while manual requests may take one to two working days.

Can I change my mobile number without visiting the broker office?

Yes. Most brokers allow online updates without requiring a physical visit.

Why is the mobile number important in a Demat account?

Your mobile number is used for OTP verification, transaction alerts, and account security notifications.