報錯內容：
E:\迅雷下載>fastboot oem lock
FAILED (remote: 'unknown command')
解決方法：
1.首先打開開發者模式啟動usb調試
2.重啟到fastboot ，輸入
E:\迅雷下載>fastboot flashing lock
(bootloader) Please select 'YES' on screen if you want to continue...
此時會在手機屏幕看見一個提示，選yes按電源鍵確定
(bootloader) Locking bootloader...
(bootloader) Locked!
OKAY [ 19.432s]
Finished. Total time: 19.438s