The exact steps leading to the error often look like this:
Lock and unlock the bootloader | Android Open Source Project The exact steps leading to the error often
Which (TWRP, custom ROM, factory image) are you trying to flash? Share public link Turning on "OEM Unlocking" inside your phone's Android
Always check the "Option Bytes" configuration in your programmer before starting a flash procedure. The exact steps leading to the error often
The error is a protective security message triggered by Android’s Android Open Source Project Bootloader Protection when a user attempts to modify firmware partitions via fastboot while the bootloader remains securely locked. Turning on "OEM Unlocking" inside your phone's Android Developer Options menu only authorizes the device to receive unlock protocols; you must still execute explicit command-line instructions within a fastboot window to successfully change the system's lock state.
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
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