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本文对广州市内的某些手机信号盲点地区进行了实地通话试验对比，分析了全球通和中联通在网络方面的投入，同时还验证了双频手机抢线快过单频的说法。
In this paper, Guangzhou City, some mobile phone signal blind spot areas conducted field trials comparison of GSM and China Unicom in the network investment, but also verified dual-band mobile phone grab line faster than the single argument.