https://blog.wongcw.com/2018/12/06/vivo-%e5%85%ac%e4%bd%885g%e6%89%8b%e6%a9%9f%e6%96%b0%e9%80%b2%e5%b1%95%e9%a6%96%e6%ac%a1%e5%af%a6%e7%8f%be5g%e9%ab%98%e6%b8%85%e8%a6%96%e9%a0%bb%e7%9b%b4%e6%92%ad/