Using ls -al /dev/block/by-name , the critical firmware partitions are:
: If updating via FOTA, use a reliable Wi-Fi network rather than mobile data to avoid extra charges or interrupted downloads. Frequently Asked Questions Software Upgrade - TCL Firmware TCL 20E
Before downloading any firmware, you must identify your specific model. TCL has released variants of this phone, and installing the wrong file can permanently damage your device. Using ls -al /dev/block/by-name , the critical firmware