The easiest and safest method is the system. What is Firmware? - Maple Systems
There are two primary ways to update or reinstall the software on your device. Firmware TCL 20B
Before searching for firmware, verify your device matches these official specifications to avoid using the wrong software: MediaTek Helio P22 (MT6762). Operating System: Android 11 with TCL UI. Memory: 4GB RAM / 64GB ROM. Display: 6.52" HD+ Mini-notch. How to Update Your TCL 20B Firmware The easiest and safest method is the system
Firmware is the core software that bridges your hardware and its Android operating system, controlling everything from its 50MP camera to battery management. Keeping your firmware updated ensures better security, bug fixes, and improved performance. Key Specifications of the TCL 20B (Model 6159K) Firmware TCL 20B