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手机的用户识别卡简称SIM卡,是用户一张资料卡。在SIM卡中,存储着以下内容: 用户识别号码 SIM卡中存储的用户识别号码是全球统一编码的唯一能识别用户的号码,它能使网络识别用户归属于哪个国家、哪一个电信经营部门,甚至归属于哪一个移动业务服务区。它不同于用户的手机号码,它是网络识别用户用的,它与用户的手机号码被—一对应地存在网络的归属用户数据库中,用户无需关心自己的用户识别号码是多少,只要知道自己的手机号码就可以了。用户的密钥和两种保密算法用户的密钥被称作m,两种保密算法分别被称作A3人保密算法,每次网
The SIM card of the mobile phone subscriber identity card is a data card of the user. The SIM card stores the following contents: Subscriber Identification Number The subscriber identification number stored in the SIM card is the only number that can identify the user in the universal code. It enables the network to identify which country the user belongs to and which telecom business department, Which mobile service even belongs to the service area. It is different from the user’s mobile phone number, which is used by the network to identify the user, which is associated with the user’s mobile phone number is stored in the home network corresponding to the user database, the user need not care about their own user identification number is as long as know their own Phone number on it. The user’s key and two kinds of secret algorithm The user’s key is called m, two kinds of secret algorithm are called A3 secret algorithm, each time the network