You can update your Aadhaar details for free, but only until December 14. The Unique Identification Authority of India (UIDAI) is offering free online updates for things like your address and phone number. After December 14, a small fee will apply. This deadline has been extended several times, and it is unlikely to be extended again. To update biometric details, you will need to visit an Aadhaar enrollment centre. Don’t miss this last chance to update your Aadhaar for free.