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目前在我国移动通信市场上只有中国移动、中国联通两家公司经营 GSM 手机,两家公司在全国各地都建立了各自的分公司、营业厅或代办点。为了区分各个地区的手机用户,两家公司都给各个地区分配了不同的号码段,因此从手机号码可以判断出该手机的归属地。虽然移动、联通两家公司都提供了来电显示功能,但有时看到一个陌
Currently in China’s mobile communications market, only China Mobile, China Unicom, two companies operating GSM mobile phones, the two companies across the country have established their own branch offices, business offices or charge d’affaires. In order to distinguish between mobile phone users in various regions, the two companies are assigned to different regions of different numbers, so from the phone number can determine the ownership of the phone. Although mobile, China Unicom, both companies have provided Caller ID function, but sometimes see a stranger