Abstract: System and methods for authenticating a UE, using one of two novel immutable factors, for granting access to premium resources. One immutable factor includes a public ID of the UE and its true geolocation, while the other consists of the SDID of UE and its true geolocation. For the public ID based system, a non-terrestrial communication network verifies geolocation of an LBS provider by comparing geolocation with the publicly known geolocation of the LBS provider After receiving true geolocation coordinates, LBS provider grants or denies UE's resource access request by comparing geolocation of UE with the geolocation(s) retrieved from the credential database which contains a list of preauthorized geolocation(s) for the legitimate users of a UE. For the SDID based system, an authentication system verifies SDID of both the requesting UE and LBS provider by comparing transmitted SDID with the SDID retrieved from an SDID database.