Question: how to change mobile number in aadhar card through post?
Answer: FAQ on Updation. ... 
Using the online SSUP portal (https://ssup.uidai.gov.in/web/guest/ssup-home) Name, gender, DoB, address, mobile number and email can be updated. ... 
Yes, you can submit request for Name, gender, DoB, address and email update through Post mode.