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The success story of GSM is also the success story of the SIM. Every
subscriber needs a SIM and there is no service without it. This is
unlike some other systems where the micro-computer in the smart
card offers just an additional service which may or may not be used
by the customer. With more than
相关下载链接：//download.csdn.net/download/xinggm/2038879?utm_source=bbsseo
subscriber needs a SIM and there is no service without it. This is
unlike some other systems where the micro-computer in the smart
card offers just an additional service which may or may not be used
by the customer. With more than
相关下载链接：//download.csdn.net/download/xinggm/2038879?utm_source=bbsseo
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