LEAST COST ROUTING SYSTEM FOR INTER-OPERATOR CALLS COMPRISING A PLURALITY OF SIM CARDS FOR THE DIFFERENT OPERATORS

摘要

Inter-operator telephone calls are charged significantly higher than calls within the same operator. The present application, proposed in the field of mobile telephone networks, proposes a solution, whereby user of conventional phones, such as standard GSM phones, can transparently benefit from the best commercial offer provided by the different operators. When a user (105) belonging to a telecommunication network of one operator (101) calls a user (106) belonging to telecommunication network of another operator (103), the automatic routing system (100) of the application queries a database (109) for commercial offers of different operators, recognizes the best offer and routes the call through the network of the operator which provides the best offer. This network is accessed through a SIM card included in the automatic routing system (100).