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当老百姓正热切期望能自己拥有一部手机时,又一种手机入网方式——手机预付费SIM卡业务悄然登场。 手机预付费SIM卡业务是一项新兴的手机入网方式。众所周知,数字手机入网实际上就是在电信部门营业窗口办理购买手机SIM卡的手续。SIM卡是一张用户识别卡。它在一块芯片上集成有CPU、工作存储器(RAM)、程序存储器(ROM)、数据存储器(EPROM)和串行通信单元5个部分,所以SIM卡中可以存储用户个人身份号、移动用户身份码及构成无线通信所需要的相关资料。可以说SIM卡是手机身份的凭证,只有当SIM卡有效时,用户才能使用任何一部手机来打
When people are eagerly looking forward to own a cell phone, yet another way to get in the cell phone - prepaid SIM card mobile phone debut quietly. Mobile prepaid SIM card business is a new way to access mobile phones. As we all know, digital mobile phone network is actually in the telecommunications department business window to buy mobile phone SIM card procedures. The SIM card is a subscriber identification card. It integrates CPU, work memory (RAM), program memory (ROM), data memory (EPROM) and serial communication unit on a single chip, so the SIM card can store the user’s personal identification number, mobile user ID And the relevant information required to form a wireless communication. SIM card can be said that the identity of the phone credentials, only when the SIM card is valid, the user can use any cell phone to play