You can change your mobile number on the Aadhaar card by visiting the nearest Aadhaar Enrolment Centre.
You can also change your mobile number online by visiting the UIDAI website. At the centre, you will have to fill out a form, submit the required documents and biometrics, and pay the applicable fee.

Once your request is accepted, your new mobile number will be updated on your Aadhaar card.

To get an Instant e–PANMobile number to be Registered in aadhaar

To get GST Registration and Udyam also Aadhaar registered mobile number is mandatory