The easiest way to get version V386 is through your TV's built-in update tool: Press the button on your remote.
If you have already downloaded the V386 firmware file (typically an .img or .pkg file), follow these steps to install it manually: Download TCL V386 (CHASSIS MS6586)
is commonly used in several TCL Android TV models, such as the S6500 series. The easiest way to get version V386 is