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

Try the modern standard command first: fastboot flashing unlock

If you receive an "unknown command" error, try the legacy command: fastboot oem unlock 4. Confirm on the Device Try the modern standard command first: fastboot flashing

If you are trying to flash a custom ROM or update your device via Fastboot and encounter the error FAILED (remote: 'flashing lock flag is locked. please unlock it first') , it means your device's . use the following commands. . Also

Once the device is in Fastboot mode and connected to your PC, use the following commands. . Try the modern standard command first: fastboot flashing

Also, enable to allow the computer to send commands. 2. Enter Fastboot Mode