If I consistently get 'adb connection error' after trying all the standard troubleshooting steps, what might be the next step?

If the common solutions don't work, consider: Seeking help from a device-specific forum or community. Checking the unlock tool's official documentation for troubleshooting guides related to your device. Trying a different unlock tool, if one exists for your device. Consulting a professional phone repair service specializing in unlocking, as your phone may have a hardware issue or requires advanced techniques.