●      Please check whether your Mobile number is registered with UIDAI with Aadhar or not, you can visit this link and verify your Aadhar linked number: https://myaadhaar.uidai.gov.in/verify-email-mobile

●      Mobile network problem at the certain duration

●      SMS service is not active on the linked Mobile number.

●      Please try after some time in case OTP is not received from UIDAI during the Aadhaar verification.