This is the LG UP DLL for LG F640S, You need to install the LG F640S Dll before you can use LG UP to flash firmware onto your LG F640S model.
LG UP DLL for LG F640S
Click purchase button above to get the [LG-F640S_DLL.txt] which includes the full download url and password.
Please notes that this is used for LG F640S model only.
To unbrick/restore LG F640S back to stock.
You need to install latest usb drivers, LG UP DLL for LG F640S, LG UP software.
You need to have the latest firmware for LG F640S phone.
LG UP Store Ver. 1.14
LG USB drivers 4.1.1
How to Flash LG Stock firmware with LG UP
Before your start, You need to install LG USB drivers, and then intall this DLL file.
Once you have firmware downloaded, Put your phone into download mode, and run the LG UP,
LG UP should find your phone, and then choose upgrade option and select the bin/firmware you just download
click start to flash firmware onto your Phone.