Is it compulsory to have registered mobile number to use mAadhaar?

No. Anyone in India with a smartphone can install and use mAadhaar App. Although for creating the Aadhaaar profile in mAadhaar, registered mobile number is required.

Without an Aadhaar registered mobile number resident will be able to avail only a few of the services such as Order Aadhaar PVC card, Locate Enrolment Center, Verify Aadhaar, Scanning QR code etc.