LG K40 Manual PDF – Spectrum, AT&T, Metro, T Mobile, Unlocked lmx420

LG K40 offers bang for the buck. At a very budget price of around $100, it offers the same hardware and similar features as LG Stylo 5. For the very reason, its offered by most of the major US carriers.

LG K40 is available for AT&T, MetroPCS, T-Mobile, Spectrum Mobile, US Cellular, Cricket (LG Harmony 3), Tracfone (LG Solo) as well as in Factory Unlocked Variant.

In this post, I’ve accumulated all the Manuals in one place. You can Download your respective User Guide in English or Spanish as follows –


LG K40 User Manual PDF in English & Spanish

All the LG K40 variants come with a 5.7 inch HD Screen with an 18:9 aspect ratio. They all have Octa-Core Processor & 2GB RAM. All the K40 Variants are equipped with Selfie Flash, Fingerprint Sensor & Face Unlock.

However, all are not lucky enough to get 32GB Internal Storage, NFC, Android Pie 9.0 & 13MP Camera with PDAF. Along with downloading the User Manual, let’s find out the differences between the K40 variants –

1. LG K40 Manual AT&T

AT&T K40 is equipped with a 2 GHz Octa-Core MediaTek Processor. It has got 32GB internal storage and NFC.

It comes with a 13MP Camera without PDAF (Phase Detection Autofocus).

While many of the K40 variants have Android Oreo, AT&T K40 comes with Android Pie out of the box.

LG K40 Manual AT&T

You can download the AT&T English User Manual in PDF from the below link –



LG K40 AT&T Manual English PDF

The above “Table of contents”, belong to the AT&T K40 Manual.



AT&T LG K40 Manual PDF

2. LG K40 Manual Spectrum Mobile


Apart from AT&T, the rest of the K40 variants are equipped with Qualcomm Snapdragon 1.8 GHz Octa-Core CPU.

Spectrum K40 comes with Android Oreo 8.1 which can be upgraded to Android 9 via OTA System update.

Similar to the AT&T variant, Spectrum K40 lacks NFC & PDAF.  It has got 32GB Internal Storage and 13MP rear camera.

Download the K40 Spectrum Manual from the below link –

LG K40 Manual Spectrum Mobile





3. LG K40 Manual MetroPCS


The highest specced K40 comes from MetroPCS & T-Mobile.

It comes with NFC & PDAF (Phase Detection Autofocus). The rear camera is 13MP.

The processor is 1.8 GHz Qualcomm Snapdragon SDM450.

It comes with 32GB storage and Android Pie.

You can grab the MetroPCS PDF manual as follows –

LG K40 Manual MetroPCS





4. LG K40 Manual T-Mobile

The T-Mobile K40 is just the same as the MetroPCS variant.

Get the K40 Manual in English or Spanish from below links –

LG K40 Manual T Mobile





5. LG K40 Manual US Cellular


The US Cellular K40 is just the same as the Spectrum variant. It’s also upgraded to Android Pie 9.0 via OTA System Update.

The Manual is available in English & Spanish. You can download it as follows –

LG K40 Manual US Cellular





6. LG K40 Manual Factory Unlocked


The Factory Unlocked K40 is the lowest specced variant.

It comes with 16GB internal storage and 8MP Rear Camera.

It lacks NFC & PDAF.

It uses the same Snapdragon 1.8 GHz CPU as the rest of the K40 variants. It comes with Android Oreo but can be upgraded to Pie via System Update.

The User Guide for the Factory Unlocked K40 is available in English & Spanish. Use the below links to download the Manual.

LG K40 Manual Unlocked lmx420qn






For a query related to any K40 variant, feel free to leave a comment below.

LG K30 Move Apps to SD Card -lmx410 Metro, AT&T, Boost Mobile

LG K30 comes with 32GB internal memory. Out of which hardly 16GB is available as usable storage space. Over a period of time, this limited space is consumed by apps, games, photos, videos, etc.

The good thing is that K30 has got expandable memory. A micro SD can give you a boost in storage space. However, the bad news that apps and games are not installed on the SD Card. They use internal memory.

To fix this issue we can use the adoptable storage feature on LG K30. This way we can create a partition on the SD card which acts as the internal storage. It becomes the default storage space for app installation.

So, Let’s find out how to move apps to SD card on LG K30 –

How to Move Apps to SD Card on LG K30

NOTE: Make sure you take a complete backup of your internal storage and SD card before moving further. You should use a high-speed Micro SD memory card (at least Class 10) to partition it as internal storage.


lg k30 move apps to sd card

Read moreLG K30 Move Apps to SD Card -lmx410 Metro, AT&T, Boost Mobile

LG K40 Factory Reset, Hard Reset, Soft Reset, Network Settings – lmx420

There are 4 ways to reset an LG K40. Based on the severity of the problem we have to make use of the reset function. The 4 kinds of reset are Soft Reset, Factory Reset, Hard Reset & Network Settings Reset. They all are quite useful in troubleshooting.

Soft Reset & Network Settings Reset does not affect the data stored in the internal memory or SD card. However, the internal memory including apps & games, etc. are wiped during a factory reset / hard reset.

Let’s check them out in great detail with the help of the below screenshots & video –

1. LG K40 Soft Reset / Force Restart – lmx420

  • First Method


lg k40 soft reset

A soft reset is nothing but a normal restart. If your K40 is acting abnormally your first troubleshooting step should be a Soft Reset.

To perform a Soft Reset, long-press the power button as shown above.



how to soft reset lg k40


You’ll see various options on the screen. Select “Power off and restart”.

Now tap “RESTART” and wait for the phone to boot again.


  • Second Method

LG K40 Force Restart

Read moreLG K40 Factory Reset, Hard Reset, Soft Reset, Network Settings – lmx420