| 摘要 |
A mobile radiotelephony device is provided which allows features to be added on to a low-cost/entry-level device, without having to access the hardware in the device, wherein the features are already contained in the basic equipment of the mobile radiotelephony device but are also blocked to prevent their access, until such time that the functions are released by a user of the mobile radiotelephony device with the aid of a release code that is supplied wirelessly by a service provider in the form of a radio signal.
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