Unlock Nokia 3 Bootloader

  1. Enable developer options

  2. Enable OEM Unlocking (OEM Unlock)

  3. Enable USB debugging mode

  4. Change default USB configuration, choose File Transfer (MTP)

  5. Install adb and fastboot (sudo apt-get install android-tools-adb android-tools-fastboot)

  6. Install nokia usb drive

  7. Connect your phone to your PC and approve all usb connection

  8. Type adb devices, then it will show the serial number

  9. Type adb reboot bootloader, then your devices will boot into fastboot mode

  10. Type fastboot devices, to make sure that your device still connected to your PC and it will show your phone serial number

  11. Type fastboot oem key $(echo -n "YOUR_PHONE_SERIAL_NUMBER" | md5sum | tr [a-z] [A-Z])

  12. Type fastboot flashing unlock, your phone will ask you about unlocking bootloader

  13. Press vol up (yes)