Warning!!!! I'm not responsible for bricked devices ,corrupted emmc ,etc etc..... (please do a NAND backup in SP flash tool)So first of all we have to unlock the bootloader using fastboot commands (i used Minimal ADB and Fastboot ) 1.Put your phone in fastboot mode by using " adb reboot bootloader " command by enabling usb debugging in Developer options (click the build number 5 times) 2.type "fastboot flashing unlock" or "fastboot oem unlock"...Read more