How to change the mobile number in an Aadhaar card?

You can change the mobile number in your Aadhaar card by visiting any authorized Aadhaar Enrolment or Update Centre. Alternatively, you can use the official Aadhaar app, which supports mobile updates via face authentication. To update offline, book an appointment on the UIDAI website, visit the center with your Aadhaar card, and complete biometric verification. No additional documents are required for this update. A fee of 75 rupees is applicable for the service. The update usually reflects in the database within 30 days.