Visit the nearest Aadhaar Enrolment/Update Centre
Carry your Aadhaar card and a valid photo ID
Fill the Aadhaar Update/Correction form
Select mobile number update
Enter the new mobile number in the form
Submit the form to the operator
Provide biometric verification if asked
Pay the applicable update fee
Collect the acknowledgment slip with URN
Wait for the update to be processed
Check the update status on the UIDAI website using the URN
Use the new mobile number for Aadhaar OTP services after update is completed