LG K40 Drivers LM-X420 – USB, ADB, Windows 10 & Mac

There are many instances when we need to connect our LG K40 to the computer. A successful USB connection is established only after the proper installation of the USB driver.

The LG K40 drivers needed for different kinds of USB connections are MTP driver for file transfer, ADB interface driver for ADB mode or USB debugging and USB serial port driver for download mode or firmware update via LGUP flash tool.

Let’s download the LG K40 Windows 10 / Windows 7  driver and learn how to establish a successful USB connection between our K40 and the computer by installing it –

How to install LG K40 USB Driver – Windows 7 & 10

Download the Latest LG K40 Driver for Windows and Mac from the respective download links –

LG K40 Mobile Driver v 4.4.2 – Download the setup file and save on your computer

Read moreLG K40 Drivers LM-X420 – USB, ADB, Windows 10 & Mac

LG K40 Firmware Download & Update / LMX420MM Stock ROM MetroPCS

The need to flash a stock firmware arises when either you’ve bricked your phone or unable to do OTA (Over the air) System update.

In some cases, the phone bricks when the firmware update process gets stuck in the midway. If your LG K40 is stuck on the firmware update screen then you’re at the right place.

To flash stock firmware /ROM on LG K40 we need to download a few files –

1. LG Mobile USB Driver v4.4.2 setup file – Download and install this file on your PC

DOWNLOAD

2. LGUP Dual Mode.zip  – Download & Extract this file on your computer

DOWNLOAD

3. LG K40 MetroPCS Stock Firmware ROM X420MM10g.zip – Download and extract this file on your computer

DOWNLOAD

LG K40 Stock Firmware / ROM Download & Software Update – MetroPCS LM-X420MM

Let’s divide the whole process into 4 steps for the ease of understanding –

STEP 1: Installing the USB Driver and booting the phone into Download Mode

 

LG K40 MetroPCS firmware download

 

Read moreLG K40 Firmware Download & Update / LMX420MM Stock ROM MetroPCS