針對(duì)用戶攜號(hào)轉(zhuǎn)網(wǎng) ,為挽留用戶 ,三大運(yùn)營商都有哪些舉措?
導(dǎo)語:針對(duì)用戶攜號(hào)轉(zhuǎn)網(wǎng),為挽留用戶