https://blog.wongcw.com/2020/10/14/%e8%98%8b%e6%9e%9ciphone-12-5g%e8%83%bd%e5%8a%9b%e7%a2%be%e5%a3%93android%ef%bc%9a18%e9%a0%bb%e6%ae%b5%e3%80%81%e5%bb%a3%e9%9b%bb700mhz%e4%b9%9f%e8%83%bd%e4%b8%8a/