iPlay50非Pro(T1030)

PS C:\Users\Sys> fastboot oem unlock “E:\编程及MC等\刷机\酷比魔方\文件\解bl\signature.bin”
…
FAILED (remote: Unlock bootloader fail.)
finished. total time: 0.103s

二楼大的方法：

PS C:\Users\Administrator> fastboot flashing unlock
FAILED (remote: ‘unknown cmd.’)
fastboot: error: Command failed
PS C:\Users\Administrator>

cmd运行同样如此