1. nexus 5X update to 8.0
下载工具，cmd进入命令行，打开文件所在位置
https://dl.google.com/android/repository/platform-tools-latest-windows.zip
adb version下载镜像，解压，解压后所有文件复制到tools文件目录下
8.0镜像
adb devices显示设备连接 List of devices 显示id
adb reboot bootloader显示start界面
fastboot oem unlock选择Yes, 音量键选择
flash-all.bat等待更新完成
2. problems
List of devices attached adb server version (31) doesn’t match this client (36); killing…
端口被占用 一般是360手机助手，进程里关闭即可
FAILED (remote: oem unlock is not allowed)
需要 enabled OEM unlocking in dev settings