https://blog.wongcw.com/2020/04/18/%e5%88%86%e6%9e%90%e5%b8%ab%e9%a0%90%e8%a8%88%e8%98%8b%e6%9e%9c%e6%9c%83%e5%85%88%e6%8e%a8%e5%87%ba%e6%94%af%e6%8c%816ghz%e4%bb%a5%e4%b8%8b%e9%a0%bb%e6%ae%b5%e7%9a%845g-iphone/