Hello ,

If u wish to update mobile number linked to your Aadhaar card you need to visit the permanent enrollment center or Sub Divisional Magistrate  (SDM) office nearby your area. You can also go to any cyber café in your area if you want hassle free service and save time and avoid long queues. UIDIA states that it takes 90 days for the mobile number to get updated but process usually takes 5-6 days and you will get a confirmation message once the process is completed.

Hope it help