关于Sim卡的基本知识
用户识别模块或用户识别模块(SIM)是安全地存储国际移动用户识别码(IMSI)和用于识别和验证移动电话设备(例如移动电话和计算机)上的用户的相关密钥的集成电路。
关于Sim卡的基本知识
它也是一种便携式存储器芯片,主要用于在全球移动通信系统(GSM)网络上运行的手机中。这些卡保存帐户持有者的个人信息,包括他或她的电话号码,地址簿,文本消息和其他数据。当用户想要更换电话时,他或她通常可以轻松地从一个手机中取出卡并将其插入另一个手机中。SIM卡方便且受到许多用户的欢迎,是开发手机技术的关键部分。
SIM卡有四(4)种类型。命名为H1,H2,H3,H4
H1 =你将获得正常网络这个模拟器
H2 =你将获得更好的网络这个模拟器,意味着强大的
H3 =你将获得更好的网络在这个模拟器,意味着更强的
H4 =正常,更好,更好更好的是在前面这个辛。
基本上H4 Sim为企业模拟,陆军人民等提供。公司不向所有用户提供H4 Sim,因为这个Sim吃更多的带宽。
SIM卡有三种不同的尺寸,以适应不同的设备。大多数手机都使用mini-SIM或micro-SIM卡,这些卡非常小 – 迷你尺寸为25 mm x 15 mm,微型尺寸为15 mm x 12 mm。全尺寸卡尺寸更大,85.6 mm×53.98 mm,并且对于大多数手机而言太大了。所有卡的厚度仅为0.76毫米,微芯片触点的排列方式相同。这意味着,使用适当的适配器,较小的卡可用于为较大的设备设计的设备。
SIM卡为用户的数据和他或她的电话提供安全性。卡可以被锁定,这意味着只有拥有正确个人识别码(PIN)的人才能使用该卡。如果手机被盗,小偷无法使用锁定的SIM卡或在没有PIN的情况下获取任何信息。
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