Download the specific YT9216BJ firmware intended for your unit. Using a file for a different model (like the YT9213AJ ) can brick your device. Trusted sources for these files include developer communities like XDA-Developers or the official XYAuto website.
or the internal "Link" app (like ZLink or TLink) to improve phone mirroring. Common Troubleshooting Factory Settings Password : If you need to access protected settings, try Version Mismatch