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