Language It is to be noted that changes to the mobile number on the Aadhaar details cannot be made online. To link their mobile with the Aadhaar card, or to make updates to the same, one needs to visit their nearest Aadhaar enrolment center or at the Aadhaar Seva Kendra. Follow the steps below to update name, gender, and date of birth in your Aadhaar card online: Step 1: Visit www.uidai.gov.in Step 2: Click on 'Update Demographics Data Online' under 'My Aadhaar' tab. Step 3: A new tab will open on your screen. Click on 'Proceed to Update Aadhaar'. Step 4: You will be required to enter your Aadhaar number and captcha code. Click on OTP. A one-time password (OTP) will be sent to your registered mobile number. Enter the OTP to proceed further. The OTP received via SMS on your mobile phone is valid for 10 minutes only.