Failed -remote 39-flashing Lock Flag Is Locked. Please Unlock It First 39-- -

Enable OEM unlocking in Developer Options (already done).

Open a terminal (Command Prompt/PowerShell) on your PC in your Platform Tools folder adb reboot bootloader Enable OEM unlocking in Developer Options (already done)

Once in Fastboot mode, use one of the following commands depending on your device's manufacturer: Enable OEM unlocking in Developer Options (already done)