Do not trust random YouTube links or third-party forums blindly. Here are the sources for TCL 55C2US firmware.
When users search for "tcl 55c2us firmware update work" , they usually mean one of three things:
Go to and disable auto-update. Then, go to Settings > System Update and disable automatic system updates. We want total manual control for this process.
: Download the Update.img file specific to the 55C2US (often found on official TCL Support or specialized enthusiast channels like the TCL Telegram group) and place it in the root directory.