解锁教程:http://bbs.gfan.com/android-8404948-1-1.html
platform-tools 地址: https://dl.google.com/android/repository/platform-tools-latest-windows.zip
简述:开发者模式中开启 OEM 解锁后,重启手机进入 bootloader 模式,在电脑端运行 fastboot oem unlock
原厂镜像(v7.1.1)地址: https://dl.google.com/dl/android/aosp/sailfish-nof27b-factory-5a8a6e11.zip