If you are staring at this error on your screen, your bootloader unlock attempt has been rejected by the device's firmware. This guide explains why this error happens and the step-by-step methods to resolve it. Understanding the Error
Download and install the official or the Google USB Driver via Device Manager. If you are staring at this error on
Several paid commercial tools have been reported to successfully resolve the "serial not match" error when free methods fail. If you are staring at this error on