LG Stylo 3 Plus MP450 Hidden Menu & Other Secret Dialer Codes

LG Stylo 3 Plus MetroPCS MP450 & T-Mobile TP450 has got a few useful dialer codes which when dialed reveal a Secret Menu. The most significant secret menu is the “Hidden Menu”.

It has got an extensive list of options which can bring changes to system level settings. The hidden menu also allows us to test Wifi, Bluetooth, GPS etc & can be used for troubleshooting purposes.

Let’s explore all the Stylo 3 Plus dialer codes starting with the Hidden Menu.

1. LG Stylo 3 Plus Dialer Code to Enter the Hidden Menu

 

LG Stylo 3 Plus Hidden Menu Secret Code

 

Open the phone dialer and dial 277634#*#

As soon as you would dial the last character i.e # the Hidden Menu will open.

LG Stylo 3 Plus Hidden Menu

The above screenshot shows a complete list of options under the hidden menu. Let’s check out a few of them in the following screenshots.

Watch the above video to explore every available option in the Hidden Menu.

LG Stylo 3 Plus Hidden Menu – Version Info

LG MP450 Hidden Menu Version Info

The Version Info gives us the current Software Version, Firmware Version, Kernel Version, Baseband Version, Hardware Version, Factory Version as well as the Anti-rollback Version.

As you can see the Anti-rollback version is 0, this means the current firmware can be downgraded.  If it’s 1, then rolling back to the previous/lower version is not possible.

LG Stylo 3 Plus Hidden Menu – Bluetooth Test

LG Stylo 3 Plus Bluetooth Test

As visible in the screenshot above, BT stands for Bluetooth Test.

The first option BT_Test asks for a “Service Code Input”. It is meant for LG Service technicians and should not be messed with.

LG MP450 Bluetooth Test

The next option under Bluetooth Test is Bluetooth FCC.

Now I’m not sure if this FCC stands for Federal Communications Commision or something else. It has got various testing parameters which I can hardly deduce.

LG Stylo 3 Plus Hidden Menu – Wifi Test

LG Stylo 3 Plus Wifi Test

The next option in the list is “Wifi Test”.

Under Wifi Test, “Net Info” reveals the network information of the connected wifi network.

LG MP450 Wifi Teset

The next option under Wifi test is FTM test.

FTM either stands for Field Test Mode or Fine Timing Measurement. We can set the testing parameters and start the FTM test as shown above.

LG TP450 Wifi Test

The next option is “OTA Settings”. Using this we can Enable or Disable OTA (over the air) software updates.

I can be very helpful in preserving data when you’re reluctant to update the current Android software.

LG Stylo 3 Plus Wifi Debug Screen

Wifi Debug screen gives a detailed information of the connected Wifi network which can prove useful for Wifi debugging.

LG Stylo 3 Plus Hidden Menu – GPS Test

LG Stylo 3 Plus GPS Test

After the Wifi Test, comes GPS Test as visible in the screenshot above.

The first test under GPS is GNSS test, where GNSS stands for Global Navigation Satellite System.

 

LG MP450 GPS Test

The next test under GPS is GNSS Positioning Test.

Change the location mode from Battery Saving to normal mode before performing this test.

LG TP450 GPS Test

The last GPS test is Air Test. We need to turn ON GPS to perform this test.

You should perform any of these tests only in case you’re facing some issues with GPS on your Stylo 3 Plus.

LG Stylo 3 Plus Hidden Menu – Network Mode Selection (RAT_Selection)

LG Stylo 3 Plus Network Mode Selection

The next significant option after GPS test is RAT_Selection.

It is nothing but Network Mode selection. Using this we can switch between 2G, 3G, and 4G LTE networks.

LG Stylo 3 Plus Hidden Menu – Enginnering Mode

Stylo 3 Plus Engineering Mode

After RAT_Selection comes Engineering Mode.

It is related to cellular network testing and should not be messed with.

LG Stylo 3 Plus Hidden Menu – Battery Status

LG Stylo 3 Plus Battery Status

Battery Status gives us a detailed battery report including its health, voltage, and temperature as visble in the screenshot above.

LG Stylo 3 Plus Hidden Menu – Unlock APN

Stylo 3 Plus APN Unlock

APN Unlock option can be useful for GSM + CDMA phones from LG wherein the APN is locked and cannot be modified.

LG Stylo 3 Plus Hidden Menu – Add Volte Test APN

Stylo 3 Plus Volte Test APN

“ADD Volte Test APN” can be useful in troubleshooting data related issues when using Volte for the internet.

LG Stylo 3 Plus Hidden Menu – IMS Setting

LG Stylo 3 Plus IMS Setting

Few LG users have faced error message “LG IMS has stopped working”.

The solution is to change the IP version from default IPV6V4 to IPV4V6 under “IMS Setting”.

LG Stylo 3 Plus Hidden Menu – LTE Data Test

LG Stylo 3 Plus LTE Data Test

The next is the LTE Data Test.

I can be useful in troubleshooting issues related to LTE data connectivity.

LG Stylo 3 Plus Hidden Menu – Benchmark Enable

Stylo 3 Plus Benchmark Enable

The “Benchmark Enable” option is disabled by default and can be checked to turn ON as visible in the screenshot above.

LG Stylo 3 Plus Hidden Menu – Port Check Test

Stylo 3 Plus Port Check Test

Port check Test needs turning ON to enable Diagnostic Mode.

Diag mode is usually needed for programming CDMA phones.

LG Stylo 3 Plus Hidden Menu – Charging Mode On/Off

LG Stylo 3 Plus Charging Mode ON OFF

I haven’t tried to disable the charging mode to the OFF position. Maybe it disables USB charging when connected to a computer.

 

2. LG Stylo 3 Plus Dialer Code to Enter “Phone Testing Menu”

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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.

DOWNLOAD 

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

Move on to Next Page (Page 2)

LG Stylo 3 Plus Download Mode & Recovery Mode MP450 / TP450

The 2 most significant modes of troubleshooting on LG Stylo 3 Plus are Recovery Mode & Download Mode.

As the name suggests, recovery mode is useful is recovering our Stylo 3 Plus if acting abnormally or not booting at all. Recovery Mode is a separate partition so even if the phone is not booting to the Home screen we can still access the recovery mode. We can perform factory data reset / hard reset via recovery mode.

Download Mode offers a higher level of troubleshooting as compared to recovery mode. In recovery mode, we can only perform a factory data reset. However, if the problem is severe and boot partition is affected then download mode comes to rescue. Download Mode can be used to flash a stock Stylo 3 Plus firmware to restore the boot partition thus unbricking the phone to working state.

Let’s check out how to get the most out of these modes of troubleshooting –

 

How to boot LG Stylo 3 Plus MP450 & TP450 into Download Mode

Before booting our Stylo 3 Plus into Download mode, we need to install LG USB Driver on our computer. If you’ve not yet installed the LG driver download the setup file from the below link –

DOWNLOAD

Click on the downloaded exe file i.e “LGMobileDriver_WHQL_Ver_4.2.0.exe” to run the setup wizard.

Complete the driver installation by following the InstallShield wizard as shown above.

Once the driver installation is complete we’re ready to connect the phone to PC in Download Mode.

To Enter Download mode –

Power OFF your Stylo 3 Plus

Connect one end of a USB data cable to your phone. Now press the Volume UP key as shown above

Keep the Volume UP button pressed and connect the other end of the USB data cable to the computer.

Your Stylo 3 Plus must be now in the Download Mode.

Download Mode is the black Firmware Update screen as shown above.

Its shows the firmware update process while flashing a stock firmware in Download Mode.

As soon as you boot into download mode the driver installation will initiate on its own.

Wait for the driver installation to complete.

Notice the driver installation.

LGE AndroidNet USB Modem & LGE AndroidNet Serial Port driver is needed for flashing a stock ROM.

Now we’re ready to restore a bricked LG Stylo 3 Plus MP450 / TP450.

How to boot LG Stylo 3 Plus MP450 & TP450 into Recovery Mode

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LG Stylo 3 Plus FRP Bypass Google Account MP450 TP450 2019

Bypassing a google account on LG Stylo 3 devices from Boost Mobile & Cricket is easier and similar to other LG models running on Android Nougat. However, none of those methods work on Stylo 3 plus from MetroPCS and T-Mobile.

To bypass Google account on LG Stylo 3 plus we need to pair it with a Bluetooth device. So, keep your Bluetooth headset handy before heading towards the tutorial.

The process is lengthy but it’s a sure shot method and the step by step tutorial with screenshots will make the process easier.

The whole process can be divided into 6 parts. Let’s proceed to bypass google account on LG Stylo 3 Plus –

How to Bypass Google Account on LG Stylo 3 Plus MetroPCS & T Mobile 2018

Step 1:  Getting access to Phone Settings

Since, Android Lollipop, when doing factory data reset using volume down + power button (via recovery mode), we need to verify the last synced google account as a security measure to complete the factory reset process.

You can see that I’ve done a hard reset via recovery mode and I’m on the welcome screen of the setup wizard.

I’ve connected my phone to the Wifi network to proceed further.

lg stylo 3 plus verify your google account

You can see, I’m stuck on google verification page with this message “This device was reset. To continue, sign in with a Google Account that was previously synced on this device.”

So, in case you’ve forgotten your Google account details then follow the steps below to bypass this Google’s Factory Reset Protection ( FRP) screen.

Let’s begin the process by going back to the Welcome screen of the setup wizard and tap on “Accessibility” as shown above.

stylo 3 plus mp450 google bypass

In Accessibility, click on the first option i.e Vision and turn ON Talkback by sliding the toggle to ON position.

lgmp450 frp bypass

Now that talkback is ON, make an L on screen as shown above.

A “Global Context Menu” pop-up would appear.

Double tap on “Talkback Settings” to open it.

 

lgtp450 frp bypass

Now when we’re on “Talkback Settings” page, we would suspend talkback by pressing both Volume UP & Down keys simultaneously. Double tap on “OK” to suspend talkback.

On “Talkback Settings” page, scroll down and open “Help & feedback”

Now select “About Switch Access for Android”.

lg mp450 metropcs google account bypass

Scroll down and look for the youtube video as shown above.

Tap on the share button marked with the red arrow, this way we would land to the youtube app.

Again tap on share icon on the top right corner.

lg tp450 t-mobile frp bypass

Among the list of options, tap on Gmail

In Gmail app, we’ve to add an email account other than Google, it can be yahoo mail, Hotmail etc.

To do this click on “Add an email address” as shown above.

google verification bypass mp450

I’ve added my yahoo mail account.

lgtp450 google bypass

As  the yahoo mail account is added, click on “TAKE ME TO GMAIL”

Now, Tap on the “3 dots” icon on the right-hand top corner & select “Settings”

 

lg stylo 3 plus bypass google account

Again tap on the “3 dots” icon, then “Manage accounts” and finally “CONTINUE” to land to the Settings app.

Step 2:  Disabling Google Play Services and Pairing with a Bluetooth Headset

lg mp450 google account

In “Settings”, select “General tab and open “Fingerprints & Security”

Now look for “Phone administrators” and open it.

We’ve to Deactivate the “Android Device Manager”.

Tap on “DEACTIVATE” and when its OFF go 2 steps back to the Main Settings page.

lg stylo 3 plus latest frp bypass

Now open “Apps”. Scroll down and look for “Google Play Services”

We’ve to “Force Stop” and “Disable” Google Play Services.

Tap on “Disable” and confirm the action.

Now select “Force Stop” and do the same.

Again go 2 steps back to the Main Settings Page.

bypassing google account on stylo 3 plus with bluetooth headset

This time we need to pair a Bluetooth Headset with our LG Stylo 3 Plus.

 

lg stylo 3 plus bluetooth pairing for google bypass

Turn on your Bluetooth headset and Pair it with your Stylo 3 Plus.

I’ve paired my Nokia Bluetooth Headset BH-111 as shown above.

 

Once paired, restart the phone.

Step 3: Launching Maps using Bluetooth headset voice command & once again getting access to phone settings

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