Visit your bank branch or use the bank’s mobile banking app, internet banking, or ATM if the bank supports it
Carry your bank passbook, debit card, and valid identity proof if visiting the branch
Fill out the mobile number update or registration form
Enter your correct mobile number clearly on the form
Submit the form to the bank official or complete the online request
Verify your mobile number through OTP if required
Complete any biometric, PIN, or signature verification if asked
Wait for the bank to process the request
Check for SMS confirmation from the bank
Test the link by requesting a balance inquiry, OTP, or transaction alert
Contact customer care if the mobile number is not updated after processing time