Visit the official UIDAI website
Go to the Aadhaar Update section
Select the option to update mobile number
Enter your Aadhaar number and captcha
Request and verify OTP if needed
Fill in the new phone number details
Submit the update request
Book an appointment at the Aadhaar Seva Kendra if online update is not available
Visit the center with your Aadhaar card and supporting documents
Complete biometric verification
Collect the update request acknowledgment slip
Check update status on the UIDAI website
Download the updated Aadhaar after the number is changed