Fastboot oem unlock invalid command

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So I said to myself, well maybe the Linux fastboot is busted, or doesn't do large blocks or something, so I downloaded the Windows Android SDK and tried to install it in a virtual machine. So I figured the factory cable must be the problem (even though I could see the device) and I ordered a high quality one from Monoprice. Both the X4 and Z2 behave exactly this way no matter which cable or how I wave my arms.

(bootloader) 'get_unlock_datas' is not a supported oem command

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