I'm not sure that's relevant in your case, but it certainly wouldn't hurt to check. There is one last/other thing to consider, on many devices-especially Nexus devices-there is a Settings -> Developer options -> OEM unlocking switch that must be enabled before you're allowed to unlock your bootloader. If fastboot otherwise works (i.e., fastboot devices and fastboot getvar all), then any error you get after that indicates a command sequences that's incorrect or not implemented. This can be customized in the following files: Fastboot Flash: Code: fastboot flash devicevalidation fastboot flash boot boot.img fastboot flash system system.img fastboot flash cust cust.img fastboot flash recovery recovery.img fastboot flash cache fastboot flash boot fastboot flash ptable fastboot reboot. However, if OEMs or network providers want to lock down 'fastboot' it can be done by disabling the keypad and usb driver in bootloader. It goes in the spirit of Android Open Source Project where end users and developers have access to the source code to allow them to modify it and upgrade their device over usb using 'fastboot'. Q2) How do I disable 'fastboot' for my commercial device?Ī2) Personally, I would like to see commercial devices leave 'fastboot' enabled.
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