New independent mobile service providers (IMSP) and mobile virtual operators (MVNOs) have entered in the telecommunication market who offers their services in the networks of licensed mobile operators.

From the user point of view, all other than licensed mobile operators are virtual operators because they do not have their own network.

Interconnection between MVNO and other networks and Call origination.

Hundreds of millions of US dollars are now being invested into mobile networks; MVNOs offer an attractive option to expand these opportunities.