If you haven’t registered your mobile with Aadhar or you have lost or do not possess your Aadhar registered mobile number anymore, you will have to either visit nearest Aadhar Update Centre or send your Aadhar Update request through Post for update your data in Aadhar.
refer for more details: https://www.quora.com/How-can-I-download-an-Aadhar-card-without-providing-mobile-number
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