Connect the device to your PC using a high-quality USB cable. Android Open Source Project Step 3: Run the Unlock Command Open a command prompt or terminal in your platform-tools folder and run: For newer devices (2015+): fastboot flashing unlock For older devices: fastboot oem unlock Android Open Source Project ⚠️ WARNING: Unlocking the bootloader will factory reset
Remove and reinstall each removable unit. A misseated unit keeps the lock flag active. Connect the device to your PC using a high-quality USB cable
To resolve this, you generally need to unlock the bootloader before the device will accept the flash command. Common Fixes Connect the device to your PC using a high-quality USB cable