Activity field of virtual operators includes a wide range, but on the whole, the operator does not invest in in the Radio Access Network (RAN) and uses the RAN of one or more Main Network Operators (MNO) in the country. Virtual operator concentrates on Core Network and invests in it. A parts of the MVNO range includes the operators that presents their private SIM cards without any private infrastructure (Light MVNO). In addition, Full MVNOs including radio infrastructures and other sections of mobile communication network (Core Network Equipment) privately/independently are a part of the range. It is evident that variety of virtual operator’s services depends on number of its private infrastructure equipment. In this case, managing the subscribers, security and security control, Quality of Services (QoS), and pursuing the related policy is performed by virtual operator.
