| 摘要 |
A method is provided for activating an optional feature in a data processing device that includes a microprocessor and memory. The method includes storing in the memory: a number of applications programs, at least one of which has at least one optional feature; application manager software for controlling access to the application programs; a communications software module, accessed by means of the application manager, for controlling data communication by the device; and a program activation software module, accessed by means of the application manager and including activation data that indicates whether each optional feature is activated or unactivated. The method also includes receiving a request to operate one of the optional features, determining by reference to the activation data whether the feature is activated or unactivated, operating the feature if it is activated and otherwise preventing operation of the feature. The method further includes receiving a request to activate the feature (if unactivated) and updating the activation data to indicate that the feature has been activated.
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