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Locking method and unlocking method

An unlocking and non-locking technology, applied in the field of communications, can solve the problems of complicated mobile phone hardware design and increased cost, and achieve the effect of solving after-sales maintenance problems, preventing illegal rewriting, and guaranteeing legitimate rights and interests.

Inactive Publication Date: 2007-08-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this will inevitably complicate the hardware design of the mobile phone and increase the cost.

Method used

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  • Locking method and unlocking method

Examples

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0024] To complete the network lock, card lock and unlocking functions of the present invention, both hardware and software need to be processed together. The hardware aspect will be described below with reference to FIG. 1 .

[0025] Fig. 1 is the view according to the related hardware design that locking method of the present invention will use, as shown in Fig. 1, in hardware design, need to connect a GPIO (general purpose input and output) pin of mobile phone main control chip 102 to flash104 On the WP# pin, at the same time, connect a resistor 106 (its resistance value is selected according to the specific situation, generally about 100K ohms) to the ground lev...

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Abstract

The locking method includes following steps: step S202, storing symbol of locking type in specific area of memory device of mobile terminal in advance; step S204, after first time to use mobile terminal, and detecting SIM card of mobile terminal successfully, reading IMEI number of mobile terminal in specific area, and symbol of locking type, and then based on read symbol of locking type to carry out corresponding process. Thus, it is convenient for operation manager to carry out operation of locking network, locking cards for centralized purchased handsets. Using specific network and specific SIM cards can operate the locked handsets, or other SIM cards will not make locked handsets work. The locked information is stored in write protection area of protected flash so as to protect the locked information from rewriting unlawfully. Based on requirement, locked handsets can be unlocked in order to solve maintenance issue after sale.

Description

technical field [0001] The present invention relates to the field of communications, and more specifically, to a method for locking a mobile terminal through a network lock or a SIM card (subscriber identity model, called a customer identification module, also called a smart card, or a subscriber identity card) and a method for locking a mobile terminal. A method for unlocking a device locked according to this locking method. Background technique [0002] At present, in order to develop users, many GSM (global system for mobile communication, known as Global System for Mobile Communications) network operators mostly adopt preferential policies such as recharging mobile phones to buy mobile phones at low prices or even get mobile phones for free. If this kind of subsidized mobile phone is sold at a high price, the operator needs to restrict the network access of this mobile phone. For example, if the network of China Mobile is locked, the card of China Unicom cannot be used; ...

Claims

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Application Information

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IPC IPC(8): H04Q7/32H04M1/66G06F12/14G06K19/073H04W8/18H04W8/20
Inventor 曹明赵薇李凯
Owner ZTE CORP
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