If using a PC, install the latest MTK VCOM Drivers so the computer can recognize the phone in "Preloader" mode. 4. Troubleshooting and Manual Downloads
If the progress bar fails to move, Windows has likely blocked the MediaTek device driver signature. Restart your computer in Advanced Boot Options, select , and reinstall the VCOM drivers manually through the Windows Device Manager. Status BROM Exception Errors Firmware TCL 20B
Because the TCL 20B relies on a MediaTek MT6762 chipset, the industry-standard installation process uses the . Step 1: Extract the Firmware Files If using a PC, install the latest MTK
If you previously rooted your phone or installed a custom recovery and want to return to a secure, official state for warranty purposes, stock firmware is required. Prerequisites Before Flashing Restart your computer in Advanced Boot Options, select
Flashing the stock ROM replaces your phone's existing operating system with a fresh, clean version straight from the manufacturer. This process is highly effective for resolving several critical software issues:
For the , firmware updates are primarily handled through official over-the-air (OTA) methods or specialized desktop tools provided by TCL. 1. Official Software Update Methods
What is the found on your device box or settings? (e.g., 6159K, 6159A)