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

To bypass this error and proceed with flashing, follow these standard procedural steps: Enable Developer Options : Navigate to Settings > About Phone Build Number

Do not panic. Try these solutions in order. The first or second method usually works 80% of the time. To bypass this error and proceed with flashing,

Error in console:

(Adjust the port to your system: COM3 on Windows, /dev/cu.usbserial on Mac) Error in console: (Adjust the port to your

The lock flag may be corrupted. Erasing the entire flash clears all flags. If that circuitry is broken, you must do the above manually

If you are using a development board (like NodeMCU or Wemos D1), it usually has automatic reset circuitry. If that circuitry is broken, you must do the above manually.

Brands like Xiaomi, Sony, and Motorola require you to request a unique unlock code from their official websites before these commands will work. Samsung devices often require a specific "Download Mode" procedure.