Search for "TCL Android TV Firmware" on XDA. Many developers maintain threads with mirrors to Google Drive and MediaFire containing older versions if you need to "downgrade" for better performance. List of Common TCL Platforms
Go to Settings > Device Preferences > About > System Update. Select and choose the file on your USB. ⚠️ Critical Safety Warning link download tcl firmware for all models
This guide provides a comprehensive overview of how to find and download TCL firmware for various models and regions. Understanding TCL Firmware Types Search for "TCL Android TV Firmware" on XDA
Release the button when the "Software Updating" screen appears. link download tcl firmware for all models