Portable data medium e.g. smart card, operating method for e.g. mobile telephone, involves detecting output of warning for user via terminal by data medium in case that rate of wear exceeds predetermined threshold

摘要

The method involves determining a rate of wear of a component (5) of a data medium (2) by the data medium, where the data medium communicates contact-bound and/or contactless with the terminal. An output of a warning for a user is detected via a terminal e.g. mobile telephone (1), by the data medium in the case that the rate of wear exceeds a predetermined threshold, where the warning informs about the necessity of an exchange of the data medium in the terminal to the user.