Updating the firmware can be done wirelessly via OTA or manually through official TCL tools.

Ensure your phone has at least 50% power.

Eliminates system lag, random app crashes, and battery drain issues caused by corrupted system files.

The code that initializes the hardware and starts the operating system when you turn on the phone.

In the drop-down menu of the SP Flash Tool, ensure that is selected. Warning: Do not select "Format All + Download" unless absolutely necessary, as this can delete your phone's unique IMEI number and network calibrations.