If your device is carrier-locked (e.g., Verizon), you can find specific firmware version details and update history on Verizon Support or other regional carrier sites.
TCL provides a Mobile Upgrade Tool that can be downloaded to a PC to flash the latest official software if your phone is not responding. firmware tcl 50 5g link
Official firmware is generally distributed through a few verified channels to ensure your device remains secure and stable. If your device is carrier-locked (e