Notebookcheck

LG K40S Smartphone Review – With true dual camera

Florian Schmitt, 👁 Florian Schmitt (translated by DeepL / Ninh Duy), 12/19/2019

More modern and more battery. The LG K40S, the successor to the LG K40, has fewer screen edges and significantly more battery capacity. In addition, it's even a bit cheaper, but there's no progress in terms of performance. You'll find out whether it's still worth buying in the test.

LG K40s
LG K40S (K Series)
Graphics adapter
Memory
2048 MB 
Display
6.1 inch 19.5:9, 1560 x 720 pixel 282 PPI, Capacitive, IPS, glossy: yes
Storage
32 GB eMMC Flash, 32 GB 
, 18 GB free
Connections
1 USB 2.0, Audio Connections: 3,5mm-Audioport, Card Reader: microSD up to 2 TB, dedicated, 1 Fingerprint Reader, NFC, Brightness Sensor, Sensors: Acceleration sensor, Proximity sensor
Networking
802.11 b/g/n (b/g/n = Wi-Fi 4), Bluetooth 5.0, 2G (850/​900/​1800/​1900), 3G (B1/​B2/​B5/​B8), 4G (B1/​B3/​B7/​B8/​B20/​B38), Dual SIM, LTE
Size
height x width x depth (in mm): 8.6 x 156.3 x 73.9 ( = 0.34 x 6.15 x 2.91 in)
Battery
3500 mAh Lithium-Polymer
Operating System
Android 9.0 Pie
Camera
Primary Camera: 13 MPix f/2.0, phase comparison AF, LED flash, @1080p/30fps videos (camera 1); 5.0MP, f/2.2, wide-angle lens (camera 2)
Secondary Camera: 13 MPix f/​2.0
Additional features
Speakers: Mono loudspeaker at the lower edge, Keyboard: Virtual, Charger, USB cable, 24 Months Warranty, LTE Cat 4 (150Mbps/50Mbps); SAR value: 0.4W/kg (head), 1.529W/kg (body); MIL-STD-810 certified, notification LED, fanless
Weight
173 g ( = 6.1 oz / 0.38 pounds), Power Supply: 56 g ( = 1.98 oz / 0.12 pounds)
Price
159 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Comparison Units

BewertungRating VersionDatumModellGewichtLaufwerkGroesseAufloesungPreis ab
74%712/2019LG K40S
Helio P22 MT6762, PowerVR GE8320
173 g32 GB eMMC Flash6.1"1560x720
82%606/2019LG K40
Helio P22 MT6762, PowerVR GE8320
145 g32 GB eMMC Flash5.7"1440x720
75%708/2019Samsung Galaxy A10
7884B, Mali-G71 MP2
168 g32 GB eMMC Flash6.2"1520x720
75%711/2019Motorola Moto E6 Plus
Helio P22 MT6762, PowerVR GE8320
149.7 g32 GB eMMC Flash6.1"1560x720
72%705/2019Honor 8A
Helio P35 MT6765, PowerVR GE8320
150 g32 GB eMMC Flash6.09"1520x720

Case, Equipment and Operation - Now with Notch

Compared to the LG K40, the affordable LG K40S mid-range device looks more modern because it has much narrower edges around the screen. The new model is slightly longer and wider, but also much heavier than its predecessor. The smartphone is available in three colour variants, namely grey, black and blue. The plastic case doesn't look very good, but it's stable and functional. The chassis is MIL-STD-810 certified.

Bluetooth 5.0 and NFC are not a matter of course with every device in this price range, but 32 GB mass storage is available everywhere. It's nice that there's a notification LED despite the narrow screen edges. Dual SIM and a dedicated micro SD slot are also on board.

With WLAN, you have to cut back compared to the LG K40, the fast ac standard is omitted here. This is particularly unfortunate because the predecessor model also knew how to exploit it. The LG K40s thus falls back to the usual speed level for the price class.

Size Comparison

156.3 mm / 6.15 inch 73.9 mm / 2.91 inch 8.6 mm / 0.3386 inch 173 g0.3814 lbs156.28 mm / 6.15 inch 73.5 mm / 2.89 inch 8 mm / 0.315 inch 150 g0.3307 lbs155.6 mm / 6.13 inch 73.06 mm / 2.88 inch 8.6 mm / 0.3386 inch 149.7 g0.33 lbs155.6 mm / 6.13 inch 75.6 mm / 2.98 inch 7.9 mm / 0.311 inch 168 g0.3704 lbs153 mm / 6.02 inch 71.9 mm / 2.83 inch 8.3 mm / 0.3268 inch 145 g0.3197 lbs
Networking
iperf3 Client (receive) TCP 1 m 4M x10
LG K40
802.11 a/b/g/n/ac
221 (min: 107, max: 246) MBit/s ∼100% +281%
Motorola Moto E6 Plus
802.11 b/g/n
68 (min: 52, max: 77) MBit/s ∼31% +17%
Honor 8A
802.11 b/g/n
66 (min: 58, max: 65) MBit/s ∼30% +14%
LG K40S
802.11 b/g/n
58 (min: 53, max: 59) MBit/s ∼26%
Samsung Galaxy A10
802.11 b/g/n
53.6 (min: 39, max: 60) MBit/s ∼24% -8%
iperf3 Client (transmit) TCP 1 m 4M x10
LG K40S
802.11 b/g/n
55.1 (min: 51, max: 59) MBit/s ∼100%
Samsung Galaxy A10
802.11 b/g/n
50.6 (min: 27, max: 58) MBit/s ∼92% -8%
Motorola Moto E6 Plus
802.11 b/g/n
46.6 (min: 36, max: 55) MBit/s ∼85% -15%
LG K40
802.11 a/b/g/n/ac
39.6 (min: 10, max: 54) MBit/s ∼72% -28%
Honor 8A
802.11 b/g/n
36.9 (min: 22, max: 52) MBit/s ∼67% -33%
0102030405060Tooltip
; iperf3 Client (receive) TCP 1 m 4M x10; iperf 3.1.3: Ø57.6 (53-59)
; iperf3 Client (transmit) TCP 1 m 4M x10; iperf 3.1.3: Ø55 (51-59)

Cameras - A lot of camera for the price

Front camera recording
Front camera recording

A lot has happened with the cameras, so there is now a dual camera on the back. And the second lens isn't just a supporting lens for the bokeh effect, no, it's an actual wide-angle lens. And you can even zoom between the two lenses in 5 steps. Not bad for such a cheap smartphone. The image quality of the 13-megapixel camera is also decent, but clear artifacts are visible when the sky is blue. Also, the sharpness of detail is not very high, which isn't unusual in this price range. In low light we even like the brightening and the dynamics of the images quite well.

The front camera takes reasonable snapshots, but could still improve the detail sharpness considerably.

Gimmicks with the flash are back on board, as well as the possibility to take several photos in a row and put them together to a moving GIF.

Image Comparison

Choose a scene and navigate within the first image. One click changes the position on touchscreens. One click on the zoomed-in image opens the original in a new window. The first image shows the scaled photograph of the test device.

Scene 1Scene 2Scene 3
click to load images
ColorChecker Photo
29.6 ∆E
53.1 ∆E
39.9 ∆E
35.3 ∆E
45.7 ∆E
62 ∆E
52.3 ∆E
34.9 ∆E
42.3 ∆E
28.4 ∆E
63 ∆E
63 ∆E
30.6 ∆E
46.6 ∆E
36.2 ∆E
71.6 ∆E
43 ∆E
42.4 ∆E
73.7 ∆E
68.8 ∆E
51.5 ∆E
37 ∆E
24.4 ∆E
13.9 ∆E
ColorChecker LG K40S: 45.38 ∆E min: 13.95 - max: 73.65 ∆E
ColorChecker Photo
7.3 ∆E
2.9 ∆E
7.9 ∆E
6.4 ∆E
4 ∆E
5.4 ∆E
6.6 ∆E
7.4 ∆E
5.2 ∆E
3.9 ∆E
3.9 ∆E
1.9 ∆E
4.1 ∆E
9 ∆E
5.6 ∆E
3.1 ∆E
3.5 ∆E
4.4 ∆E
5.6 ∆E
2.3 ∆E
2.5 ∆E
6.2 ∆E
7.8 ∆E
9.2 ∆E
ColorChecker LG K40S: 5.25 ∆E min: 1.89 - max: 9.22 ∆E
Testchart Perfect illumination
Testchart Perfect illumination
Testchart 1 Lux
Testchart 1 Lux

Display - Little new

Sub-pixel array
Sub-pixel array

Apart from the fact that the screen now has a slightly modified format and is only disturbed by a waterdrop notch instead of thick edges on the sides, little has changed compared to the LG K40: The screen is still quite bright and the maximum brightness can also be achieved manually if desired. The values in many areas are very similar to those of the LG K40, so it's reasonable to assume that the LG uses the same panel and at most has changed details in the control. There is still a clearly visible blue cast.

For its class, the display is nothing special in terms of both resolution and brightness, but is no worse than other smartphones in this price category.

451
cd/m²
478
cd/m²
453
cd/m²
483
cd/m²
487
cd/m²
459
cd/m²
476
cd/m²
498
cd/m²
451
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 498 cd/m² Average: 470.7 cd/m² Minimum: 2.74 cd/m²
Brightness Distribution: 91 %
Center on Battery: 487 cd/m²
Contrast: 1739:1 (Black: 0.28 cd/m²)
ΔE Color 5.56 | 0.6-29.43 Ø6
ΔE Greyscale 5.2 | 0.64-98 Ø6.2
93.7% sRGB (Calman 2D)
Gamma: 2.124
LG K40S
IPS, 1560x720, 6.1
LG K40
IPS, 1440x720, 5.7
Samsung Galaxy A10
IPS, 1520x720, 6.2
Motorola Moto E6 Plus
IPS, 1560x720, 6.1
Honor 8A
IPS, 1520x720, 6.09
Response Times
6%
16%
3%
11%
Response Time Grey 50% / Grey 80% *
50 (25, 25)
38 (19, 19)
24%
38 (19, 19)
24%
53.6 (29.2, 24.4)
-7%
48 (20.4, 27.6)
4%
Response Time Black / White *
30 (15, 15)
32 (19, 13)
-7%
16 (5, 11)
47%
26 (12.8, 13.2)
13%
24.8 (9.2, 15.6)
17%
PWM Frequency
100 (10)
100 (15)
0%
77 (10)
-23%
Screen
-15%
-6%
-1%
-10%
Brightness middle
487
475
-2%
451
-7%
453
-7%
522
7%
Brightness
471
467
-1%
430
-9%
440
-7%
542
15%
Brightness Distribution
91
90
-1%
90
-1%
86
-5%
94
3%
Black Level *
0.28
0.32
-14%
0.22
21%
0.14
50%
0.47
-68%
Contrast
1739
1484
-15%
2050
18%
3236
86%
1111
-36%
Colorchecker DeltaE2000 *
5.56
5.95
-7%
5.44
2%
7.2
-29%
4
28%
Colorchecker DeltaE2000 max. *
9.64
12.62
-31%
11.94
-24%
12.7
-32%
9.5
1%
Greyscale DeltaE2000 *
5.2
7.9
-52%
7.8
-50%
8.4
-62%
6.6
-27%
Gamma
2.124 104%
2.331 94%
2.206 100%
1.95 113%
2.28 96%
CCT
7932 82%
8202 79%
9149 71%
8296 78%
7258 90%
Total Average (Program / Settings)
-5% / -10%
5% / -0%
1% / 0%
1% / -6%

* ... smaller is better

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
30 ms ... rise ↗ and fall ↘ combined↗ 15 ms rise
↘ 15 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 72 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (24.9 ms).
       Response Time 50% Grey to 80% Grey
50 ms ... rise ↗ and fall ↘ combined↗ 25 ms rise
↘ 25 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.9 (minimum) to 636 (maximum) ms. » 82 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (39.6 ms).

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM detected 100 Hz ≤ 10 % brightness setting

The display backlight flickers at 100 Hz (Likely utilizing PWM) Flickering detected at a brightness setting of 10 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 100 Hz is very low, so the flickering may cause eyestrain and headaches after extended use.

In comparison: 51 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 13646 (minimum: 43 - maximum: 2500000) Hz was measured.


CalMAN Greyscale
CalMAN Greyscale
CalMAN Color accuracy
CalMAN Color accuracy
CalMAN Color space
CalMAN Color space
CalMAN Saturation
CalMAN Saturation

Performance, Emissions and Battery Life - Slightly too slow

You already know the Helio P22 from the LG K40, so the benchmark results are quite similar. The LG K40S can get a few percentage points ahead, possibly due to optimized software, but this won't be noticeable in everyday life. If you want to gamble, the games shouldn't be too demanding. In everyday life you have to live with smaller jerkers and delays, even when surfing the web you have to wait a little longer for pictures every now and then.

A microSD, for example our reference card Toshiba Exceria Pro M501, is written to and read with average speed. The same applies to the internal memory.

We don't notice too much warming with the LG K40S. LG seems to have made significant improvements to the loudspeaker, offering more deep mid-range, making it appear warmer and more present. The speaker isn't for real audio enthusiasts, but it's OK for in between. 3D surround sound can be simulated via headphones using DTS-X.

Thanks to a battery with 500 mAh more capacity, the battery life in our WLAN battery test has also increased significantly. 14:20 hours is the best result in the comparison field, even if the differences are not huge. You should definitely survive a working day with your smartphone without having to charge it.

PCMark for Android
Work 2.0 performance score (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
3993 Points ∼74%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
3805 Points ∼70% -5%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
5136 Points ∼95% +29%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
5237 Points ∼97% +31%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
4886 Points ∼90% +22%
Average Mediatek Helio P22 MT6762
  (3805 - 5237, n=11)
4523 Points ∼83% +13%
Average of class Smartphone
  (2630 - 11690, n=423)
5425 Points ∼100% +36%
Work performance score (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
4764 Points ∼69%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
4404 Points ∼64% -8%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
6823 Points ∼99% +43%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
6922 Points ∼100% +45%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
4045 Points ∼58% -15%
Average Mediatek Helio P22 MT6762
  (4404 - 6922, n=11)
5664 Points ∼82% +19%
Average of class Smartphone
  (1077 - 15193, n=586)
5899 Points ∼85% +24%
3DMark
2560x1440 Sling Shot Extreme (ES 3.1) Unlimited Physics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
928 Points ∼46%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
912 Points ∼45% -2%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
1615 Points ∼80% +74%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
1183 Points ∼59% +27%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
1021 Points ∼51% +10%
Average Mediatek Helio P22 MT6762
  (912 - 1183, n=10)
979 Points ∼49% +5%
Average of class Smartphone
  (573 - 5576, n=431)
2014 Points ∼100% +117%
2560x1440 Sling Shot Extreme (ES 3.1) Unlimited Graphics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
435 Points ∼24%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
431 Points ∼24% -1%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
439 Points ∼24% +1%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
449 Points ∼25% +3%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
432 Points ∼24% -1%
Average Mediatek Helio P22 MT6762
  (376 - 449, n=10)
423 Points ∼23% -3%
Average of class Smartphone
  (75 - 8374, n=431)
1813 Points ∼100% +317%
2560x1440 Sling Shot Extreme (ES 3.1) Unlimited (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
493 Points ∼29%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
488 Points ∼29% -1%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
524 Points ∼31% +6%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
521 Points ∼31% +6%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
496 Points ∼29% +1%
Average Mediatek Helio P22 MT6762
  (435 - 521, n=10)
484 Points ∼29% -2%
Average of class Smartphone
  (93 - 6916, n=432)
1690 Points ∼100% +243%
2560x1440 Sling Shot OpenGL ES 3.0 Unlimited Physics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
966 Points ∼50%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
912 Points ∼47% -6%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
1629 Points ∼85% +69%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
1195 Points ∼62% +24%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
961 Points ∼50% -1%
Average Mediatek Helio P22 MT6762
  (900 - 1195, n=11)
977 Points ∼51% +1%
Average of class Smartphone
  (375 - 5133, n=461)
1925 Points ∼100% +99%
2560x1440 Sling Shot OpenGL ES 3.0 Unlimited Graphics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
704 Points ∼29%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
695 Points ∼29% -1%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
646 Points ∼27% -8%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
740 Points ∼31% +5%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
695 Points ∼29% -1%
Average Mediatek Helio P22 MT6762
  (452 - 740, n=11)
672 Points ∼28% -5%
Average of class Smartphone
  (70 - 20154, n=461)
2420 Points ∼100% +244%
2560x1440 Sling Shot OpenGL ES 3.0 Unlimited (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
749 Points ∼37%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
734 Points ∼36% -2%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
746 Points ∼36% 0%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
808 Points ∼40% +8%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
741 Points ∼36% -1%
Average Mediatek Helio P22 MT6762
  (513 - 808, n=11)
720 Points ∼35% -4%
Average of class Smartphone
  (88 - 10427, n=461)
2044 Points ∼100% +173%
2560x1440 Sling Shot Extreme (ES 3.1) Physics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
897 Points ∼47%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
881 Points ∼46% -2%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
1682 Points ∼88% +88%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
1130 Points ∼59% +26%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
998 Points ∼52% +11%
Average Mediatek Helio P22 MT6762
  (860 - 1130, n=10)
954 Points ∼50% +6%
Average of class Smartphone
  (435 - 4909, n=511)
1922 Points ∼100% +114%
2560x1440 Sling Shot Extreme (ES 3.1) Graphics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
265 Points ∼18%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
303 Points ∼20% +14%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
444 Points ∼29% +68%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
392 Points ∼26% +48%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
223 Points ∼15% -16%
Average Mediatek Helio P22 MT6762
  (257 - 392, n=10)
316 Points ∼21% +19%
Average of class Smartphone
  (53 - 7150, n=511)
1510 Points ∼100% +470%
2560x1440 Sling Shot Extreme (ES 3.1) (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
314 Points ∼22%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
355 Points ∼24% +13%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
531 Points ∼36% +69%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
459 Points ∼32% +46%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
270 Points ∼19% -14%
Average Mediatek Helio P22 MT6762
  (305 - 459, n=10)
371 Points ∼25% +18%
Average of class Smartphone
  (68 - 6319, n=512)
1457 Points ∼100% +364%
2560x1440 Sling Shot OpenGL ES 3.0 Physics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
902 Points ∼50%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
912 Points ∼51% +1%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
1674 Points ∼94% +86%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
1139 Points ∼64% +26%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
997 Points ∼56% +11%
Average Mediatek Helio P22 MT6762
  (854 - 1139, n=11)
964 Points ∼54% +7%
Average of class Smartphone
  (293 - 4900, n=553)
1789 Points ∼100% +98%
2560x1440 Sling Shot OpenGL ES 3.0 Graphics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
440 Points ∼22%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
512 Points ∼26% +16%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
582 Points ∼29% +32%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
645 Points ∼32% +47%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
429 Points ∼22% -2%
Average Mediatek Helio P22 MT6762
  (370 - 645, n=11)
508 Points ∼26% +15%
Average of class Smartphone
  (43 - 11302, n=552)
1989 Points ∼100% +352%
2560x1440 Sling Shot OpenGL ES 3.0 (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
497 Points ∼29%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
567 Points ∼33% +14%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
681 Points ∼40% +37%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
714 Points ∼41% +44%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
491 Points ∼28% -1%
Average Mediatek Helio P22 MT6762
  (428 - 714, n=11)
567 Points ∼33% +14%
Average of class Smartphone
  (55 - 8338, n=555)
1724 Points ∼100% +247%
1280x720 offscreen Ice Storm Unlimited Physics (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
10194 Points ∼68%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
11443 Points ∼76% +12%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
11287 Points ∼75% +11%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
15069 Points ∼100% +48%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
10689 Points ∼71% +5%
Average Mediatek Helio P22 MT6762
  (9674 - 15069, n=11)
11641 Points ∼77% +14%
Average of class Smartphone
  (735 - 45072, n=708)
14454 Points ∼96% +42%
1280x720 offscreen Ice Storm Unlimited Graphics Score (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
10804 Points ∼47%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
10531 Points ∼46% -3%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
11335 Points ∼50% +5%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
11349 Points ∼50% +5%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
7061 Points ∼31% -35%
Average Mediatek Helio P22 MT6762
  (9536 - 11349, n=11)
10521 Points ∼46% -3%
Average of class Smartphone
  (536 - 209204, n=706)
22753 Points ∼100% +111%
1280x720 offscreen Ice Storm Unlimited Score (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
10662 Points ∼58%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
10721 Points ∼58% +1%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
11324 Points ∼62% +6%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
11921 Points ∼65% +12%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
7637 Points ∼42% -28%
Average Mediatek Helio P22 MT6762
  (9835 - 11921, n=11)
10706 Points ∼58% 0%
Average of class Smartphone
  (662 - 97276, n=706)
18376 Points ∼100% +72%
GFXBench
off screen Car Chase Offscreen (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
2.8 fps ∼22%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
2.8 fps ∼22% 0%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
4.1 fps ∼33% +46%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
2.5 fps ∼20% -11%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
2.6 fps ∼21% -7%
Average Mediatek Helio P22 MT6762
  (2.1 - 2.9, n=9)
2.69 fps ∼22% -4%
Average of class Smartphone
  (0.6 - 73, n=415)
12.5 fps ∼100% +346%
on screen Car Chase Onscreen (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
3.8 fps ∼34%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
4 fps ∼36% +5%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
8.7 fps ∼78% +129%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
4.3 fps ∼38% +13%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
3.8 fps ∼34% 0%
Average Mediatek Helio P22 MT6762
  (3.8 - 5.1, n=9)
4.37 fps ∼39% +15%
Average of class Smartphone
  (1.1 - 60, n=419)
11.2 fps ∼100% +195%
Geekbench 4.4
Compute RenderScript Score (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
2707 Points ∼58%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
2638 Points ∼56% -3%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
2832 Points ∼60% +5%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
2166 Points ∼46% -20%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
2893 Points ∼62% +7%
Average Mediatek Helio P22 MT6762
  (2166 - 3015, n=8)
2675 Points ∼57% -1%
Average of class Smartphone
  (663 - 21070, n=331)
4681 Points ∼100% +73%
64 Bit Multi-Core Score (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
3595 Points ∼76%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
3375 Points ∼72% -6%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
3590 Points ∼76% 0%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
3369 Points ∼71% -6%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
3834 Points ∼81% +7%
Average Mediatek Helio P22 MT6762
  (3300 - 3660, n=9)
3493 Points ∼74% -3%
Average of class Smartphone
  (883 - 11598, n=391)
4716 Points ∼100% +31%
64 Bit Single-Core Score (sort by value)
LG K40S
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
780 Points ∼55%
LG K40
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
758 Points ∼53% -3%
Samsung Galaxy A10
Samsung Exynos 7884B, Mali-G71 MP2, 2048
1168 Points ∼82% +50%
Motorola Moto E6 Plus
Mediatek Helio P22 MT6762, PowerVR GE8320, 2048
780 Points ∼55% 0%
Honor 8A
Mediatek Helio P35 MT6765, PowerVR GE8320, 2048
855 Points ∼60% +10%
Average Mediatek Helio P22 MT6762
  (749 - 824, n=9)
777 Points ∼54% 0%
Average of class Smartphone
  (390 - 4824, n=391)
1426 Points ∼100% +83%
LG K40SLG K40Samsung Galaxy A10Motorola Moto E6 PlusHonor 8AAverage 32 GB eMMC FlashAverage of class Smartphone
AndroBench 3-5
-6%
9%
8%
4%
-8%
4%
Sequential Write 256KB SDCard
57.8 (Tohsiba Exceria Pro M501)
57.4 (Toshiba Exceria Pro M501)
-1%
65.3 (Toshiba Exceria Pro M501)
13%
62.35 (Toshiba Exceria Pro M501)
8%
61.83
7%
51.2 (3.4 - 87.1, n=154)
-11%
49.9 (1.7 - 87.1, n=458)
-14%
Sequential Read 256KB SDCard
79.3 (Tohsiba Exceria Pro M501)
77.59 (Toshiba Exceria Pro M501)
-2%
78.8 (Toshiba Exceria Pro M501)
-1%
82.54 (Toshiba Exceria Pro M501)
4%
81.92
3%
70.1 (8.2 - 96.5, n=154)
-12%
68.2 (8.1 - 96.5, n=458)
-14%
Random Write 4KB
18.5
10
-46%
13.3
-28%
17.41
-6%
15
-19%
18.2 (0.75 - 77.3, n=197)
-2%
24.5 (0.14 - 259, n=788)
32%
Random Read 4KB
53.2
52.6
-1%
73.4
38%
61.71
16%
61
15%
40 (3.59 - 117, n=197)
-25%
49.8 (1.59 - 226, n=788)
-6%
Sequential Write 256KB
84.5
100.5
19%
101.7
20%
106.09
26%
104
23%
95.4 (14.8 - 189, n=197)
13%
102 (2.99 - 590, n=788)
21%
Sequential Read 256KB
272
261.7
-4%
296.4
9%
277.67
2%
265
-3%
237 (25.8 - 452, n=197)
-13%
284 (12.1 - 1781, n=788)
4%

Temperature

Max. Load
 37.5 °C
100 F
36.2 °C
97 F
36.3 °C
97 F
 
 38.9 °C
102 F
37.1 °C
99 F
36.9 °C
98 F
 
 39.4 °C
103 F
38.3 °C
101 F
35.9 °C
97 F
 
Maximum: 39.4 °C = 103 F
Average: 37.4 °C = 99 F
32.1 °C
90 F
36.5 °C
98 F
36.1 °C
97 F
33.1 °C
92 F
36.8 °C
98 F
37 °C
99 F
34.1 °C
93 F
38.4 °C
101 F
39.4 °C
103 F
Maximum: 39.4 °C = 103 F
Average: 35.9 °C = 97 F
Power Supply (max.)  36.9 °C = 98 F | Room Temperature 20.8 °C = 69 F | Voltcraft IR-260
(±) The average temperature for the upper side under maximal load is 37.4 °C / 99 F, compared to the average of 33 °C / 91 F for the devices in the class Smartphone.
(+) The maximum temperature on the upper side is 39.4 °C / 103 F, compared to the average of 35.5 °C / 96 F, ranging from 22.4 to 51.7 °C for the class Smartphone.
(+) The bottom heats up to a maximum of 39.4 °C / 103 F, compared to the average of 34 °C / 93 F
(+) In idle usage, the average temperature for the upper side is 29.5 °C / 85 F, compared to the device average of 33 °C / 91 F.


Heatmap - Bottom
Heatmap - Bottom
Heatmap - Top
Heatmap - Top

Speakers

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2042.9412542.340.13134.835.9403938.95040.841.66334.433.88028.128.510025.125.912523.624.616022.123.320020.22625019.63231518.441.440018.950.250020.157.26302061.380017.560.3100016.170.8125015.570.7160017.867.520001668.9250015.969.2315016.168.2400016.363.6500016.569630016.573.6800016.972.21000016.670.6125001764.81600016.553.1SPL66.667.866.429.381N19.420.818.51.247median 17median 63.6Delta1.713.242.643.240.146.131.232.736.435.740.339.132.231.62526.527.724.623.222.621.822.420.721.51920.819.524.818.633.719.642.620.151.720.262.121.368.716.270.318.669.617.667.916.467.616.865.116.272.316.875.516.97216.670.4186617.960.61744.565.864.130.843.269.830.381.81716.11.43.421.11.445.3median 18.6median 62.1218.3hearing rangehide median Pink NoiseLG K40SLG K40
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
LG K40S audio analysis

(±) | speaker loudness is average but good (81 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 34.7% lower than median
(±) | linearity of bass is average (8.3% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | reduced mids - on average 6.1% lower than median
(±) | linearity of mids is average (9.7% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 5.9% higher than median
(+) | highs are linear (5.8% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (29% difference to median)
Compared to same class
» 78% of all tested devices in this class were better, 6% similar, 16% worse
» The best had a delta of 13%, average was 25%, worst was 44%
Compared to all devices tested
» 86% of all tested devices were better, 4% similar, 11% worse
» The best had a delta of 3%, average was 21%, worst was 53%

LG K40 audio analysis

(±) | speaker loudness is average but good (81.8 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 39.3% lower than median
(+) | bass is linear (3.7% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | reduced mids - on average 10.8% lower than median
(±) | linearity of mids is average (13.7% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 7.7% higher than median
(±) | linearity of highs is average (7.4% delta to prev. frequency)
Overall 100 - 16.000 Hz
(-) | overall sound is not linear (39.5% difference to median)
Compared to same class
» 98% of all tested devices in this class were better, 1% similar, 1% worse
» The best had a delta of 13%, average was 25%, worst was 44%
Compared to all devices tested
» 98% of all tested devices were better, 0% similar, 1% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Battery Life

LG K40S
3500 mAh
LG K40
3000 mAh
Samsung Galaxy A10
3400 mAh
Motorola Moto E6 Plus
3000 mAh
Honor 8A
3020 mAh
Average of class Smartphone
 
Battery Runtime
WiFi Websurfing 1.3
860
745
-13%
753
-12%
825
-4%
828.8
-4%
670 (223 - 2636, n=653)
-22%
Battery Runtime
NBC WiFi Websurfing Battery Test 1.3
14h 20min

Pros

+ contemporary design
+ Bluetooth 5.0 and NFC
+ dedicated microSD slot
+ dual camera with optical zoom
+ bright screen
+ ordinary terms

Cons

- no WiFi 5 like its predecessor
- moderate performance
- distinct blueness

Verdict – Solid and inexpensive

In review: LG K40s. Test device provided by:
In review: LG K40s. Test device provided by:
cyberport.de

The LG K40S has upgraded its camera and battery especially when compared to its direct predecessor. We find it incomprehensible that LG has shortened the fast WiFi 5, so the K40S loses one of the advantages of its predecessor. Battery life varies by 13%, which is noticeable, but not earth-shattering.

The new cameras with wide-angle lenses and even optical zoom into the wide-angle range are a step forward, but the image quality doesn't exceed the class average.

The LG K40S has become a decent, modern smartphone. In terms of battery life and cameras, it has improved slightly compared to its predecessor.

Whether you take the LG K40 or K40S is a difficult question, probably it will ultimately be decided by the price difference between the two: If you pay significantly less for the LG K40 and are looking for a good smartphone that's as affordable as possible, you'll go for the LG K40. Even those who value high transmission speeds on the Internet will be better off here. When it comes to camera and battery, the K40S offers a bit more, plus a more modern design and a better speaker.

LG K40S - 12/19/2019 v7
Florian Schmitt

Chassis
71%
Keyboard
66 / 75 → 88%
Pointing Device
91%
Connectivity
39 / 70 → 55%
Weight
90%
Battery
90%
Display
84%
Games Performance
6 / 64 → 9%
Application Performance
42 / 86 → 49%
Temperature
89%
Noise
100%
Audio
66 / 90 → 73%
Camera
48%
Average
68%
74%
Smartphone - Weighted Average

Pricecompare

Read all 1 comments / answer
static version load dynamic
Loading Comments
Comment on this article
Please share our article, every link counts!
> Notebook / Laptop Reviews and News > Reviews > LG K40S Smartphone Review – With true dual camera
Florian Schmitt, 2019-12-19 (Update: 2020-01-30)