Lenovo A916 cannot unlock bootloader My PC OS is Gentoo Linux with Kernel version 4.4.21.
I'm followed these steps:


adb reboot bootloader
fastboot oem unlock


And after this, message pops up "... press Volume+ to continue, and Volume- to cancel", if i press "Volume+" button, nothing happens, and if i press "Volume-" button, operation cancels.

What i should do to fix it?

Or there are another way to unlock bootloader?
Try these commands:


adb reboot bootloader


Wait for your PC to install fastboot drivers for the device then


Check if device is detecting in fastboot mode

fastboot devices
If device is detected use the following command to unlock bootloader:

fastboot oem unlock


Follow the screen instructions and after unlocking reboot the device using the command:

fastboot reboot

Hope It will work for you.

Note: Unlocking bootloader will erase entire data.