Abstract: Method for blocking respectively unblocking a money account bound to a SIM card (10). The money account is designed for paying services of several providers (2). The money account is blocked respectively unblocked depending on the dynamically determined location of the mobile user.

Abstract: Method for detecting possible frauds in payment transactions between at least two partners (1, 2), the payment transaction data and/or payment authorization data being transmitted over at least one mobile radio network, at least one multivalued parameter used for detecting a possible fraud attempt being determined in said mobile radio network, said payment transactions being performed over at least one payment service provider (4), at least a second multivalued parameter used for detecting a possible fraud attempt being determined by said payment service provider (4), and certain combinations of said first and second parameters are sought in said fraud detection module in order to detect fraud attempts.

Abstract: Proposed are a method and a system for management of resources of portable resource modules (1, 1?), each connected to a communication terminal (2, 2?, 2?), which modules comprise electronic memory units (11) and are designed in particular as chipcards. A first resource management instruction comprising a module identification is transmitted to a resource management centre (4). A second resource management instruction is transmitted from the resource management centre (4) via a communication network (3) to the resource module (1) identified through the module identification. In the particular resource module (1), resources are made ready or released by a resource control mechanism (111) corresponding to the received second resource management instruction.