Failed -remote 39-flashing Lock Flag Is Locked. Please Unlock It First 39-- Instant
Power off the device, then hold Power + Volume Down (common for most devices) until the Fastboot logo appears. 3. Run the Unlock Command
Try the modern standard command first: fastboot flashing unlock Power off the device, then hold Power +
You cannot unlock the bootloader through a computer alone; you must first give the phone permission from within the Android OS. Open > About Phone . Open > About Phone
Modern Android security prevents unauthorized software changes unless the "lock flag" is explicitly flipped by the user. Here is how to fix this and successfully unlock your device. 1. Enable OEM Unlocking use the following commands. .
After sending the command, your phone screen will likely change to a confirmation page. Use the to highlight "Unlock the Bootloader" and the Power Button to confirm. The device will then wipe itself and reboot. Troubleshooting Common Issues
Once the device is in Fastboot mode and connected to your PC, use the following commands. .
Tap 7 times until you see "You are now a developer". Go back to System > Developer Options . Find OEM Unlocking and toggle it ON .