LG K40 vs LG K30 vs LG K20 Plus – lmx420 vs lmx410 vs lgmp260

LG K40 is the successor to K30 and it’s the latest entrant in this series. LG K50 is announced as well, but it’s not yet launched in the USA.

In this post, we’re going to point out the differences and similarities between LG K20, K30 & K40 and would try to find out if K40 is a true successor or not.

Please make sure that in this post I’m comparing the MetroPCS / T-Mobile variant of LG K20, K30 & K40. There will be differences between these variants and those from Boost Mobile, AT&T, Verizon, Spectrum, Xfinity or the Factory Unlocked Version.

So Let’s start with the Differences at first and later on we’ll cover the similarities between these 3 models –

Difference between LG K40, K30 & K20 Plus – MetroPCS / T-Mobile

 

LG K20 vs K30 vs K40

On the left-hand side is LG K40, K30 is at the center & K20 plus at the right.

LG k40 vs K30 vs K20

1. Release Date & Price

NAME, PRICE & RELEASE DATELG K40LG K30LG K20 Plus
Model NumberLM-X420MMLM-X410MK / X410TKMP260 / TP260
Release DateFeb 2019May 2018December 2016
Current PriceAround $100Around $70Around $70

LG K40 is not yet released for T-Mobile but the MetroPCS variant does work with T-Mobile sim card.

The price mentioned in the above table is the approximate price for a new phone at eBay.com. The price does fluctuate very often.

 

2. Body & Design

BODY & DESIGNLG K40LG K30LG K20 Plus
Body MaterialPlasticMetal & PlasticPlastic
Dimensions6.02” x 2.83” x 0.32 “5.85” x 2.95” x 0.34 “5.85” x 2.96” x 0.31 “
Weight5.1 oz5.93 oz4.94 oz
Removable Battery


You may have noticed from the above specs, that LG K40 is more compact as compared to K30 & K20 due to its 18:9 aspect ratio. It’s also lighter than LG K30.

K40 offers a better grip due to its plastic back. K30 is quite slippery and best to be used with a case. It’s also the heaviest among the 3, probably due to the use of metal in its construction.

Among the 3, only K20 Plus has a removable battery (which can be removed by a regular user).

 

3. Phone Layout

PHONE LAYOUTLG K40LG K30LG K20 Plus
Power Button LocationRightBackBack
Speaker Grill Location BottomBackBack
Sim Card / Memory Card Slot LocationLeftRightUnder the Battery Door
Additional Hardware ButtonDedicated Google Assistant Key

In the case of K30 & K20 Plus, the Power button at the back doubles as the Finger Print Sensor.  However, in K40 the fingerprint sensor is at the back & the Power button is shifted towards the right.

In K40 the positioning of speaker grill from back to the bottom is a step towards the right direction. The audio quality from the speaker is also improved as compared to K30 & K20 Plus.

There is an addition of a dedicated Google Assistant key, below the volume rocker on K40.

4. Display

DISPLAYLG K40LG K30LG K20 Plus
Screen Size5.7 inches5.3 inches5.3 inches
Aspect Ratio18:916:9 16:9
Screen Resolution / Wallpaper Size1440 x 720 pixels1280 x 720 pixels1280 x 720 pixels
Pixel Density282 ppi277 ppi277 ppi

The display on LG K40 can be considered as the biggest upgrade. Even though the display size is increased from 5.3 inches to 5.7 inches, the dimensions are almost identical thanks to the 18:9 aspect ratio.

The screen resolution is also increased to 1440 x 720 p from 1280 x 720p to compensate for the increase in the screen estate. However, the PPI (pixels per square inch) remains almost the same.

 

5. Software & Additional Features

SOFTWARE & ADDITIONAL FEATURESLG K40LG K30LG K20 Plus
Android VersionAndroid 9.0 PieAndroid 8.1 OreoAndroid 7.0 Nougat
Notification LED Light


Surround SoundDTS:X 3D SurroundDTS:X 3D Surround
Mini View / One Handed Operation


Notification LED is included for the first time in LG K40. This feature is usually missing in this price range.

K40 has the lastest Android Pie 9.0 operating system as opposed to Oreo and Nougat on K30 and K20 Plus respectively.

A mini view is introduced in K40 for easy one-handed operation.

6. Hardware & Connectivity

HARDWARE & CONNECTIVITYLG K40LG K30LG K20 Plus
NFC / Android Pay / Android Beam


Processor / CPU1.8 GHz Quad-Core 1.4 GHz Quad-Core1.4 GHz Quad-Core
Chipset 14 nm, Qualcomm Snapdragon SDM45028 nm, Qualcomm Snapdragon 425 MSM891728 nm, Qualcomm Snapdragon 425 MSM8917
GPUAdreno 506Adreno 308Adreno 308

NFC is also a part of the package in LG K40. It was a very needed upgrade and should be included in every Android smartphone.

LG K20 Plus and K30 share the same hardware which is now upgraded in LG K40. K40 has a 1.8 GHz Octa-Core Snapdragon 450 processor with Adreno 506 GPU.

 

7. Camera & Battery

CAMERA & BATTERYLG K40LG K30LG K20 Plus
Phase Detection Auto Focus (PDAF)


Manual Mode / Controls
Selfie Flash

Battery Capacity2890 mAh2880 mAh2700 mAh
Battery Life / Talk TimeUp to 12 hrsUp to 13 hrs & 40 minsUp to 14 hrs
Standby Time Up to 19 days & 10 hrsUp to 10 days & 10 hrsUp to 17 days

The camera image resolution is the same on LG K20, K30 & K40 i.e 13MP. However, the image quality has improved over a period of time. K40 camera offers better picture quality as compared to its predecessors.

K40 also has a Selfie Flash (Front Flash) and can also produce Bokeh Effect in Selfie Mode.

 

8. Root Status

Root StatusLG K40LG K30LG K20 Plus
Root Compatible


Unlockable Bootloader


Custom ROM Availability


Out of the 3, only LG K20 Plus has an unlockable bootloader and thus can be rooted.

K30 & K40 comes with a locked bootloader with no way to unlock it as of now. There is no way to root LG K30 & K40 at present.

 

 

Similarities between LG K40, K30 & K20 Plus

With the help of the below table, we can check the similarities between K20 Plus, K30 & K40. It also covers the features which are missing in all 3 of them.

What they share in commonLG K40, K30 & K20 Plus
BODY & DESIGNK40, K30 & K20 Plus
ColorBlack
Memory Card Slot / Expandable Memory
Waterproof
DISPLAYK40, K30 & K20 Plus
Display Type/TechnologyIPS LCD
Contoured / Curved Edge
Gorilla Glass
NETWORKK40, K30 & K20 Plus
Sim Size / TypeNano
GSM / CDMAGSM
Wifi Calling
SENSORS
Accelerometer
Gyroscope/VR Compatibility
Magnetometer/Digital Compass
Fingerprint Sensor
Ambient Light Sensor
Proximity Sensor
CONNECTIVITY K40, K30 & K20 Plus
USBMicro USB 2.0
USB OTG
Bluetooth
Wifi
Wifi Tethering / Hotspot
GPS
IR Blaster
MHL / Slimport Compatible
Screen Mirroring / Miracast / Screen Share
ADDITIONAL FEATURESK40, K30 & K20 Plus
FM Radio
Face Recognition (Face Unlock)
Flashlight
Google Assistant
Multi Window / Split Screen
Quick Charge / Fast Charging
Wireless Charging / Qi-enabled
MEMORYK40, K30 & K20 Plus
ROM / Internal Storage / Memory32 GB
RAM2 GB
CAMERAK40, K30 & K20 Plus
REAR
Image Resolution / Megapixels13 MP
AutofocusYes
FlashSingle LED Flash
Aperturef/2.2
ZoomUp to 4x, Digital Zoom
Video Resolution1080p @ 30fps
HDR
Face Detection
Slow Motion
Time Lapse
Video Stabilization
FRONT
Image Resolution / Megapixels5 MP
Video Resolution1080p @ 30fps

 

 

Conclusion

After the above comparison, we can easily deduce that K40 is a worthy upgrade in terms of hardware, software, and features as compared to LG K30.

In the nutshell, K40 has

 

  • A Bigger Screen with 18:9 aspect ratio
  • Lesser weight
  • Notification Light & NFC
  • Better hardware, 1.8 GHz Octa-Core CPU with Adreno 506 GPU
  • Latest Android Pie 9.0 firmware
  • Better Camera. Selfie Flash & Bokeh Effect in Front Portrait Mode

 

Please point out if some correction is needed. For any query or suggestion, please leave a comment below.

 

 

 

 

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