Once the request is submitted, the mobile number update may take 2–4 weeks to reflect in the Aadhaar database, according to an ET report. I have lost my mobile number / do not possess the number that I enrolled with Aadhaar. How should I submit my update request? keyboard_arrow_down In case you have lost/do not possess the mobile number anymore that is registered with Aadhaar, you have to personally visit the nearest Aadhaar Seva Kendra for updation of mobile number . The process for Aadhar card mobile number change does not involve any complicated procedure, here we have explained how to do that on UIDAI's online portal. Learn how to update your mobile number in Aadhaar card online or offline. Step-by-step instructions, appointment booking, fees, and status tracking explained clearly.