Data reading method and device for SIM card

Abstract

The invention relates to the technical field of communication, and discloses a data reading method and device of an SIM card. The data reading method comprises the steps that when a file selection instruction is received, a corresponding file is selected from an SIM card; when a first record reading instruction for the corresponding file is received, safety condition checking is conducted firstly,and then the corresponding record data is read from the corresponding file and returned after the safety condition checking is passed; if the safety condition check is passed, when other record reading instructions for the corresponding file are received, the safety condition check is not performed, and the corresponding record data are directly read from the corresponding file according to the current record reading instruction and returned. According to the embodiment of the invention, the security condition check is executed only when the first read record instruction of the current file is received, and the security condition check is not executed for other subsequent read record instructions of the current file, so that the reading time of each piece of subsequent record data is greatly shortened, and the data reading efficiency of the whole file is effectively improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a data reading method and device for a SIM card. Background technique [0002] The Global System of Mobile communication (GSM for short) is currently the most widely used mobile phone standard. [0003] Subscriber Identity Module (commonly known as SIM card) is also called subscriber identity card. SIM card is a communication module provided to users by communication network operators according to user's request, so that users can use the data and communication on the SIM card. The circuit implements network communication with the operator's network, thereby realizing network communication service applications such as making phone calls and surfing the Internet by the terminal. The types of SIM cards provided by different network operators and the data and protocols in the SIM cards are different. [0004] The data of the SIM card mainly includes the following types acco...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a data reading method and device for a SIM card, which overcomes the problem of slow data reading speed in the prior art

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