Contact your bank or open the bank’s mobile app or website
Log in to your account using your credentials
Go to profile, settings, contact details, or personal information
Select the option to add or update your phone number
Enter your new phone number carefully
Verify the number using the OTP or verification code sent by SMS or call
Confirm and save the changes
Visit a branch if online or app-based update is not available
Carry valid identification and bank account details if required
Ask the bank to update your registered mobile number
Complete any required form or verification process
Wait for confirmation that the phone number has been linked successfully