Importance

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Abstract

To resolve problems of communication between a mobile telephone provided with a smart-card reader and the circuits of a smart-card reader, it is planned to provide this mobile telephone with a fourth microprocessor designed to manage the communications of the mobile telephone with the smart card only. This fourth microprocessor then becomes, in competition with a SIM security circuit of the mobile telephone, a master of the microprocessor of the mobile telephone. To resolve the problem of competition resulting from the existence of these two master circuits, it is planned that one of the two will be called upon to execute a command and that it will execute this command if it falls within the commands that are executable by it. If this command is not executable by this first microprocessor, then it is transmitted to the microprocessor of the second master circuit so that this second master circuit executes it. By acting in this way, it is shown that it is very easy to update mobile telephones, even old models. To this end, it is enough to place especially the fourth microprocessor in a battery pack and interchange the battery pack with the original battery pack.

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First Claim