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.

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

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

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 –

English
DOWNLOAD
Spanish
DOWNLOAD
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 –

English
DOWNLOAD
Spanish
DOWNLOAD
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 –

English
DOWNLOAD
Spanish
DOWNLOAD
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 –

English
DOWNLOAD
Spanish
DOWNLOAD
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.

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