Connect your phone to the computer and open a command prompt / terminal.
You should now see a screen that says “Firmware Update” with a progress bar at 0%. Method 2: Using ADB Commands (Phone must be booted) Use this method if your phone is already on and you have USB Debugging enabled. How to Open Download Mode on LG V40 ThinQ
Download Mode (often called Firmware Update mode) is a low-level state on your LG V40 that allows you to flash stock firmware, unbrick the device, or perform system repairs using LG's official software (like LG Bridge or LGUP). Connect your phone to the computer and open
Type the following command and press Enter: unbrick the device
While still holding Volume Up , connect your phone to a computer using a USB cable.