Mantra RD Service does not provide key-based registration the mapping process takes place internally at OEM after registration only needs to install Registered Device services as per manuals. Mantra RD Service registration for MFS 100 is must update with the latest Aadhaar Authentication API After registering your device Mantra Device registration is upgraded with Registered Device Service from public device to L0 device to use RD service so that you can use it further in your application.