SIM card key timing deletion device and film SIM card with the device

Abstract

The invention provides a SIM card key timing deletion device, which relates to the technical field of mobile communication. The key timing deletion device includes a clock standard circuit and a key valid period counter, and the clock standard circuit utilizes the external clock signal provided by the main chip of the mobile phone to calibrate the internal clock signal generated by the internal oscillator of the SIM card, and finally outputs the standard clock signal, so The key valid period counter performs counting and timing according to the standard clock signal, and deletes the key data in the memory in the card when the key is used for a predetermined time. The SIM card key timing deletion device provided by the present invention combines the internal clock generated by the oscillator in the card itself and the external clock provided by the mobile phone terminal to perform counting and timing, and can be automatically deleted after the predetermined time expires without relying on OTA operation SIM card key. The present invention also provides a thin film SIM card with the above device.

Description

technical field [0001] The invention relates to the technical field of mobile communication, and more specifically relates to a SIM card key timing deletion device and a thin-film SIM card provided with the device. Background technique [0002] The activation and deactivation of the key in the SIM card of the mobile phone is generally implemented by the operator through the OTA (Over The Air technology, over the air download technology) command. The remote management technology, based on the short message mechanism, realizes the dynamic download, deletion and update of the service menu in the SIM card through the mobile phone terminal or server (online), so that users can obtain personalized information services. [0003] However, OTA cannot successfully complete the control of user business under any circumstances, especially when cross-operating, and these often cause troubles and even economic losses to users. Take international travel as an example, Before the user goes...

AI Technical Summary

Problems solved by technology

[0003] However, OTA cannot successfully complete the control of user business under any circumstances, especially when cross-operating, and these often cause troubles and even economic losses to users. Take international travel as an example, Before the user goes to the destination, considering the expensive international roaming charges, he can apply for a SIM card containing a specific preferential package in the country so that it can be used abroad. Since the preferential package has a certain period of use, if the user spends time abroad Exceeding this period, the promotion will be terminated, and expensive roaming charges will be generated, which will cause considerable economic losses to the user. At this time, even if the user wants to delete the key through OTA to immediately stop any online service, but due to the OTA's cross-operator Under the instability, it may not be able to achieve

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