So, my lovely XZ that is supposedly locked to Three UK says bootloader unlockable=no. However, when I hold up and plug in the usb, the light goes blue and Flashtool reports that a fastboot device is connected. Isn't fastboot unusable on a locked bootloader?
I did enough Google search to find how to check if the bootloader is unlocked or for that matter the bootloader lock status. I have found various threads which point me to different devices like HTC, Xperia, etc.