Comparison between:
- LG K4 LTE
- LG K40
- LG Spirit 4G LTE

Brand and model

Information about the brand, model and model alias (if any) of a specific device.

LG K4 LTELG K40LG Spirit 4G LTE
LG K4 LTELG K40
Prices
LG Spirit 4G LTE
Model aliasLG-K120E
K120E
LG-K130E
K130E
K4 4G
LM-X420EM
X420EM
LM-X420EMW
X420EMW
LG-H440N
H440N
LG-H440Y
H440Y
H442

Design

Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.

Width66.7 mm
6.67 cm
0.219 ft
2.626 in
71.9 mm
7.19 cm
0.236 ft
2.831 in
66.12 mm
6.612 cm
0.217 ft
2.603 in
Height131.9 mm
13.19 cm
0.433 ft
5.193 in
153 mm
15.3 cm
0.502 ft
6.024 in
133.25 mm
13.325 cm
0.437 ft
5.246 in
Thickness8.9 mm
0.89 cm
0.029 ft
0.35 in
8.3 mm
0.83 cm
0.027 ft
0.327 in
9.95 mm
0.995 cm
0.033 ft
0.392 in
Weight120 g
0.26 lbs
4.23 oz
144 g
0.32 lbs
5.08 oz
120 g
0.26 lbs
4.23 oz
Volume78.3 cm³
4.76 in³
91.31 cm³
5.54 in³
87.66 cm³
5.32 in³
ColorsBlue
White
Blue
Gray
White
Black
Gold
Body materialsPlasticPlasticPlastic
Certification-MIL-STD-810G-

SIM card

The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.

SIM card typeMicro-SIMNano-SIMMicro-SIM
Number of SIM cards221
FeaturesDual SIM stand-by (Both cards are active. When one is busy, the other is not active)Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)-

Networks

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSMGSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
UMTSUMTS 850 MHz
UMTS 900 MHz
UMTS 2100 MHz
UMTS 850 MHz
UMTS 900 MHz
UMTS 1900 MHz
UMTS 2100 MHz
UMTS 850 MHz
UMTS 900 MHz
UMTS 2100 MHz
UMTS 1900 MHz (H440Y)
LTELTE 800 MHz
LTE 1800 MHz
LTE 2600 MHz
LTE 900 MHz (K120E)
LTE 2100 MHz (K120E)
LTE 850 MHz
LTE 900 MHz
LTE 1800 MHz
LTE 2100 MHz
LTE 2600 MHz
LTE 900 MHz
LTE 1800 MHz
LTE 700 MHz (H440Y)
LTE 800 MHz (H440N)
LTE 2100 MHz (H440N)
LTE 2600 MHz (H440N)

Mobile network technologies and bandwidth

Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.

Mobile network technologiesUMTS
EDGE
GPRS
HSPA+
LTE Cat 4
UMTS
EDGE
GPRS
HSPA+
LTE Cat 6
UMTS
EDGE Class 12
GPRS Class 12
HSPA+
LTE Cat 4

Operating system

Operating system is the system software, which manages and controls the functioning of the hardware components of the device.

Operating system (OS)Android 5.1.1 LollipopAndroid 8.1 OreoAndroid 5.0.1 Lollipop
Android 6.0 Marshmallow

System on Chip (SoC)

A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.

SoCMediaTek MT6735MMediaTek Helio P22 (MT6762)Qualcomm Snapdragon 410 MSM8916
Process technology28 nm12 nm28 nm
CPUARM Cortex-A534x 2.0 GHz ARM Cortex-A53, 4x 1.5 GHz ARM Cortex-A53ARM Cortex-A53
CPU bits64 bit64 bit64 bit
Instruction setARMv8-AARMv8-AARMv8
Level 0 cache memory (L0)--4 KB + 4 KB
Level 1 cache memory (L1)32 KB + 32 KB-16 KB + 16 KB
Level 2 cache memory (L2)512 KB
0.5 MB
-2048 KB
2 MB
CPU cores484
CPU frequency1000 MHz2000 MHz1200 MHz
GPUARM Mali-T720 MP1PowerVR GE8320Qualcomm Adreno 306
GPU cores1--
GPU frequency500 MHz650 MHz400 MHz
RAM capacity1 GB2 GB1 GB
RAM typeLPDDR3LPDDR3LPDDR3
RAM channelsSingle channelSingle channelSingle channel
RAM frequency533 MHz933 MHz533 MHz

Storage

Every mobile device has a built-in storage (internal memory) with a fixed capacity.

Storage8 GB32 GB8 GB

Memory cards

Memory cards are used in mobile devices for expanding their external storage capacity.

TypesmicroSD
microSDHC
microSDXC
microSD
microSDHC
microSDXC
microSD
microSDHC

Display

The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.

Type/technologyTFTIPSIPS
Diagonal size4.5 in
114.3 mm
11.43 cm
5.7 in
144.78 mm
14.48 cm
4.7 in
119.38 mm
11.94 cm
Width2.2 in
56 mm
5.6 cm
2.55 in
64.75 mm
6.47 cm
2.3 in
58.53 mm
5.85 cm
Height3.92 in
99.64 mm
9.96 cm
5.1 in
129.5 mm
12.95 cm
4.1 in
104.05 mm
10.4 cm
Aspect ratio1.779:12:1
2:1 (18:9)
1.778:1
16:9
Resolution480 x 854 pixels720 x 1440 pixels720 x 1280 pixels
Pixel density218 ppi
85 ppcm
282 ppi
110 ppcm
312 ppi
122 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area63.63 %76.46 %69.34 %
Other featuresCapacitive
Multi-touch
Capacitive
Multi-touch
Capacitive
Multi-touch
-1500:1 contrast ratio
450 cd/m²
-

Sensors

Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.

SensorsAccelerometerProximity
Light
Accelerometer
Fingerprint
Proximity
Light
Accelerometer

Rear camera

The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.

Sensor typeCMOSCMOSCMOS
Sensor format-1/3"-
Pixel size-1 µm
0.001000 mm
-
Aperturef/2.8f/2-
Focal length and 35 mm equivalent-3.57 mm-
Flash typeLEDDual LEDLED
Image resolution2592 x 1944 pixels
5.04 MP
4608 x 3456 pixels
15.93 MP
3264 x 2448 pixels
7.99 MP
Video resolution1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
Video FPS30 fps30 fps30 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Scene mode
Autofocus
Continuous shooting
Digital zoom
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Macro mode
Phase detection autofocus (PDAF)
Autofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode

Front camera

Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.

Sensor type-CMOS-
Aperturef/2.8f/2-
Focal length and 35 mm equivalent-2.42 mm-
Auxiliary light-LED-
Image resolution1600 x 1200 pixels
1.92 MP
3264 x 2448 pixels
7.99 MP
-
Video resolution640 x 480 pixels
0.31 MP
1920 x 1080 pixels
2.07 MP
-
Video FPS30 fps30 fps-
--1 MP

Audio

Information about the type of speakers and the audio technologies supported by the device.

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
-DTS:X 3D Surround-

Radio

The radio in a mobile device is a built-in FM radio receiver.

RadioYesNoYes

Tracking/Positioning

Information about the positioning and navigation technologies supported by the device.

Tracking/PositioningGPS
A-GPS
GPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS

Wi-Fi

Wi-Fi is a technology that provides wireless data connections between various devices within a short range.

Wi-Fi802.11b
802.11g
802.11n
Wi-Fi Hotspot
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
802.11b
802.11g
802.11n
Wi-Fi Hotspot
Wi-Fi Direct

Bluetooth

Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.

Version4.15.04.0
FeaturesA2DP
AVRCP
DIP
GATT
HDP
HFP
HID
HSP
LE
MAP
OPP
PAN
PBAP
SPP
A2DPA2DP

USB

The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.

Connector typeMicro USBMicro USBMicro USB
Version2.02.02.0
FeaturesCharging
Mass storage
Charging
Mass storage
On-The-Go
Charging
Mass storage

Headphone jack

The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.

Headphone jackYesYesYes

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Tethering
Computer sync
OTA sync
Infrared
Tethering
DLNA
NFC
Computer sync
OTA sync
Tethering

Browser

A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.

BrowserHTML
HTML5
CSS 3
HTML
HTML5
CSS 3
HTML
HTML5
CSS 3

Audio file formats/codecs

Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.

Audio file formats/codecsAAC
AAC+
AMR
AMR-WB
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AC3
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
eAAC+
MIDI
MP3
WMA
WAV

Video file formats/codecs

Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.

Video file formats/codecs3GPP
AVI
H.263
H.264
MPEG-4
VP8
VP9
Xvid
3GPP
AVI
H.263
H.264
MKV
MP4
VC-1
VP8
VP9
WebM
WMV
Xvid
3GPP
AVI
H.263
H.264
MP4
WMV

Battery

The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.

Capacity1940 mAh3000 mAh2100 mAh
TypeLi-IonLi-PolymerLi-Ion
2G talk time6 h 30 min
6.5 h
390 min
0.3 days
8 h
480 min
0.3 days
6 h 42 min
6.7 h
402 min
0.3 days
2G stand-by time277 h
16620 min
11.5 days
100 h
6000 min
4.2 days
540 h
32400 min
22.5 days
3G talk time7 h 30 min
7.5 h
450 min
0.3 days
8 h
480 min
0.3 days
11 h 33 min
11.6 h
693 min
0.5 days
3G stand-by time277 h
16620 min
11.5 days
100 h
6000 min
4.2 days
591 h
35460 min
24.6 days
4G talk time5 h 30 min
5.5 h
330 min
0.2 days
-4 h
240 min
0.2 days
4G stand-by time215 h
12900 min
9 days
-636 h
38160 min
26.5 days
FeaturesRemovableNon-removableRemovable

Specific Absorption Rate (SAR)

The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.

Head SAR (EU)0.604 W/kg0.518 W/kg0.776 W/kg
Body SAR (EU)1.19 W/kg1.579 W/kg0.685 W/kg
Head SAR (USA)0.81 W/kg0.87 W/kg0.91 W/kg
Body SAR (USA)1.15 W/kg0.69 W/kg0.72 W/kg

Additional features

Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.

Additional featuresLG-K130E - SAR (Specific Absorption Rate) EU: head - 0.633 W/kg; body - 1.260 W/kg-H440Y - SAR (Specific Absorption Rate) EU: head - 0.821 W/kg; body - 0.664 W/kg
 LG K4 LTELG K40LG Spirit 4G LTE