Portable terminal locking device and method utilizing short message

Abstract

The invention relates to a locking device and the method for portable terminals utilizing short messages, wherein SIM information of a registered GSM portable terminal is changed by utilizing messages to limit use of mobile communication service. The locking device and the method for portable terminals is characterized with the following parts: a high-frequency part connected to the base station for mobile communication wirelessly and applied to receive and send communication signals, a message testing part connected to the high-frequency part and applied to detach and test messages received from the base station, a testing part for locking information applied to analyze messages inputted from the message testing part and output detached locking information, an SIM card applied to save records of locking information inputted from the testing part for locking information to the assigned area and a control part applied to monitor the assigned area of the SIM card and to control the high-frequency part to cut off sending and receiving of wireless signals if locking information is detected. The locking device and the method for portable terminals has the advantage of remote restriction so that a GSM portable terminal cannot be used without permission.

Description

technical field [0001] The present invention relates to the use of short messages to remotely control the use of portable terminals, in particular to a device and method for using short messages to lock portable terminals. SIM (Subscriber Identity Module) area, so as to remotely control the portable terminal to use mobile communication. Background technique [0002] Portable terminal (MS: MOBILE PHONE) is a convenient device that can move freely in the service area (SERVICE AREA) provided by the mobile communication system connected to the network, and communicate with the other party that has been wirelessly connected anytime and anywhere. Communicate while on the move. [0003] As channel resources for receiving and sending communication signals, the above mobile communication system uses radio frequency resources, which are limited natural resources. In order to send or receive a communication signal, radio frequency resources with a certain bandwidth need to be exclusiv...

AI Technical Summary

Problems solved by technology

[0029] However, the GSM system portable terminal (10) based on the prior art constituted as above has the following problem, that is, when the above-mentioned portable terminal (10) is lost, or when the removed SIM is lost when moving to a neighboring country, other people Even if the above-mentioned portable terminal or SIM is used to carry out unauthorized communication and movement, it cannot be prevented until the communication service provider accepts the report of loss.

[0030] In particular, there is also the following problem. From the perspective of mobile communication service providers, when it is a credit-delinquent who has not paid the communication usage fee for a long time, the communication cannot be cut off immediately.

Images