Visit the nearest Aadhaar Enrolment/Update Centre
Carry your Aadhaar card and a valid identity proof if required
Fill out the Aadhaar Update/Correction form
Select the option to update mobile number
Enter your new phone number in the form
Submit the form to the operator
Provide biometric verification if asked
Pay the applicable update fee
Collect the acknowledgement slip with the Update Request Number
Wait for the update to be processed
Check the status on the UIDAI website using the Update Request Number
Use the updated mobile number for Aadhaar-linked services