https://blog.wongcw.com/2020/01/19/5g%e7%89%88%e6%96%b0ipad%e6%9b%9d%e5%85%89%ef%bc%9a%e5%b0%87%e8%b7%9fiphone-12%e4%b8%80%e8%b5%b7%e7%99%bc%e5%b8%83/