how to unlock bootloader of oppo a1k or root. i tried patch boot.img with magisk and flashed it via cm2 but when i tried to boot it's gives security error. i have tried from adb reboot bootloader but phone just restart won't boot up to fastboot or bootloader. also tried adb reboot fastboot phone just restart. tried with vol up down power all combination phone boot to recovery not in fastboot anyone can help me unlock or root.