LG Stylo 3 Plus USB / ADB Drivers MP450 & TP450 – Installation Tutorial

In this post, we’re going to download and install the latest Windows 10 (& MAC) drivers for LG Stylo 3 Plus MetroPCS MP450 & T-Mobile TP450.

While using the LG Stylo 3 Plus, every now and then we need to connect it to the computer and driver installation is necessary for various modes of USB connection.

We need to install LG MTP drivers for file transfer between phone & PC, LG ADB drivers for Fastboot Mode & LG Serial Port Driver for doing a Firmware update in the Download Mode.

First of all, we’re going to install the latest LG Mobile Driver using the setup file on our computer. You can download the file from the below link –


For Mac (LG Mobile Driver v5.4) follow the below Link –


Click on the Setup file “LGMobileDriver_WHQL_Ver_4.2.0.exe” to start the USB driver installation.


We’ve to complete the InstallShield wizard by following step by step instructions as shown above.

Wait for the installation to complete.

The driver has installed successfully.

Now we’re ready to connect our LG Stylo 3 Plus to the computer.


In this post, we’re going to install LG Stylo 3 drivers for 3 different modes of USB connection which are –

  1. ADB Driver installation when connected in Fastboot Mode 
  2. USB Modem & Serial Port Driver Installation when connected in Download Mode
  3. MTP Driver installation when Stylo 3 is connected in File Transfer mode 


Let’s start with the installation of ADB Interface Driver. Many users face issue while installing this driver.


1. LG Stylo 3 Plus ADB Interface Driver Installation for Fastboot Mode

First of all, we are going to Enable the Developer Options which is hidden by default.

Go to Settings < About Phone < Build Number

Tap 7 times on Build Number to unhide “Developer Options”

Now go 2 steps back.  Above “About Phone” you’ll find “Developer Options”.

Open “Developer Options”. Now scroll down and look for USB Debugging.

Turn it ON by accepting the warning pop-up.

Now connect your Stylo 3 Plus to the computer.


The USB connection mode can be set to “Charging” or “File Transfer”

Wait for the ADB Interface driver to install on its own.

LGE Mobile ADB Interface driver is installed successfully.

Download and install the “Minimal ADB and Fastboot” program on your computer.


As the name suggests, this program eliminates the need to download the whole Android SDK package to connect the phone in ADB mode.  Thanks to shimp208@xda for creating this awesome software.

Run Minimal ADB and Fastboot program. It would launch the cmd command prompt window.

If LG Stylo 3 Plus ADB Interface driver is not installed successfully we cannot write any command in the cmd  Window. It would display a message “waiting for device”


Type adb devices and hit Enter on your computer keyboard

You can see our phone model is detected as LGMP450 under the “List of devices attached”

However, you can notice the connected device is “unauthorized”

If at this point, you’ll look at your phone screen there must be a pop-up asking for authorization to Allow USB Debugging.

Tap “OK” to Allow USB Debugging.

Now again type adb devices and hit Enter

Now, the computer is authorized and we can write a command to boot the phone in the fastboot mode.

To enter fastboot, type adb reboot bootloader and hit Enter

Your Stylo 3 Plus must be now in Fastboot Mode a shown above.

Once again we’ve to install the ADB Interface Driver in the fastboot mode.

Wait for the driver to install.

You can see in Device Manager, the driver installation has failed.

If same is the case with you, then follow the below steps to manually install the ADB Interface Driver.

Open Device Manager.

Under “Other Devices” you’ll find “Android” with an exclamation mark

Right Click on it and select “Update Driver Software”

Now tap on “Browse my computer for driver software”


Click on “Let me pick from a list of device drivers on my computer”


You can see “ADB Interface” under the list of hardware devices, select it an click “Next”

Now select the Manufacturer i.e Google or Samsung

Even if we install the ADB interface driver from Samsung it would work.

I’ve selected Google Inc as shown above.

Under “Model” select “LGE Mobile Sooner Single ADB Interface” and click Next.

Accept the installation warning by tapping on “Yes”

The driver installation is successful.

The ADB Interface driver is now visible in the “Device Manager”.

Now we’re ready to unlock the LG Stylo 3 Plus Bootloader.

2. LG Stylo 3 Plus USB Modem & Serial Port Driver for Download Mode


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LG Stylo 3 Plus MP450 Stock ROM/Firmware Update Download KDZ

In this post, we’re going to restore a bricked LG Stylo 3 Plus MetroPCS MP450 back to the normal working state. It can be done quite easily with this detailed step by step tutorial with screenshots.

You can also use this guide to Unroot your Stylo 3 plus back to factory state for warranty reasons or just to upgrade your phone’s firmware. So, let’s proceed with the Tutorial –

How to Unbrick & Restore LG Stylo 3 Plus MetroPCS MP450

Step 1: Download & Extract the zip file

First of all, we’ve to download the zip file from the below download link. It contains all the necessary files required for flashing.


The above zip file contains –

  1. LG Mobile USB Driver Windows setup file
  2. LGUP Store Version 1.14.3 Windows setup file
  3. MP45010f_00_0205.kdz stock firmware file
  4. UPPERCUT – It works as LG Stylo 3 Plus DLL file. It aids in the detection of Stylo 3 Plus by LGUP in the Download Mode. Without Uppercut LGUP won’t recognize the connected phone. Thanks to autoprime@xda for making this awesome tool.

Step 2: Install LG Mobile Driver and LGUP on your computer

If you’ve not yet installed the LG Stylo 3 Plus Drivers on your PC, run the setup file to proceed with the LG Mobile Driver Installation.

LG Stylo 3 Plus Download Mode Driver

Double click on the “LGMobileDriver_WHQL_Ver_4.2.0.exe” setup file to install it.

LG Stylo 3 Plus Driver Installation

Finish the LG Mobile Driver installation. It’ll take a while.

LG Stylo 3 Plus LGUP Store Ver 1.14

Next, we’re going to install the LGUP Flashing software.

Double click on the setup file “LGUP_Store_Ver_1_14_3.msi” to start the installation process.

LG Stylo 3 Plus LGUP Installation

Finish the installation, but don’t run LGUP yet.

Step 3: Connect your Stylo 3 Plus to PC in Download Mode & wait for the drivers to install

To flash the stock firmware, we’ve to boot the phone in Download Mode.

To enter download mode –

LG Stylo 3 Plus Download Mode to Unbrick

Turn OFF your Stylo 3 Plus.

Connect one end of a USB data cable to the phone.

Press the Volume UP Button as shown above.

LG Stylo3 Plus connect to PC in Download Mode

Keep the Volume UP key pressed & connect the other end of the USB data cable to the computer.



LG Stylo 3 Plus Download Mode Firmware Update

The phone should be now in Download Mode as shown in the screenshot above.

LG Stylo 3 Plus USB serial port driver installation

The driver installation will initiate on it own.

Wait for the drivers to install.

LG Stylo 3 Plus USB Mode & US Serial Port Driver Installation

You can notice the LGE AndroidNet USB Modem & LGE AndroidNet USB Serial Port drivers are installed successfully.

So, now we can proceed with the flashing process.

Step 4: Load LGUP Flashing tool using Uppercut

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