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.
Sites like HardReset.info maintain databases of stock ROMs for various TCL models, including the 50 series, which are useful for manual flashing. TCL 50 5G Specifications Overview firmware tcl 50 5g link
Official firmware is generally distributed through a few verified channels to ensure your device remains secure and stable. TCL provides a Mobile Upgrade Tool that can