Screen size
K31Winner: 5.7"+21%
K44.5"
Quick verdict
K31 leads the measured specs 11-1.
Measured wins
K31
11
spec wins
Overall winner
Ties
5
equal specs
K4
1
spec wins
Screen size
Technology
K31
GSM / CDMA / HSPA / LTE
K4
GSM / HSPA / LTE
2G bands
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
K4
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
3G bands
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
K4
HSDPA 850 / 900 / 2100 - K130E, HSDPA 850 / 900 / 1900 / 2100 - K120E, HSDPA 850 / 1700(AWS) / 1900 - K121
4G bands
K31
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
2, 4, 5, 12, 13, 25, 26, 41, 66, 71
K4
1, 3, 7, 8, 20 - K120E, 3, 7, 20 - K130E, LTE - K121
Speed
K31
HSPA, LTE
K4
HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps
Announced
K31
2020, August 21. Released 2020, August 21
K4
2016, January. Released 2016, February
Status
K31
Discontinued
K4
Discontinued
Dimensions
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
K4
131.9 x 66.7 x 8.9 mm (5.19 x 2.63 x 0.35 in)
Weight
K31
146 g (5.15 oz)
K4
120 g (4.23 oz)
SIM
K31
Nano-SIM + Nano-SIM
K4
Single SIM (Micro-SIM) or Dual SIM (Micro-SIM, dual stand-by)
Other
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
K4
-
Type
K31
IPS LCD
K4
IPS LCD
Size
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
K4
4.5 inches, 55.8 cm2 (~63.4% screen-to-body ratio)
Resolution
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
K4
480 x 854 pixels, 16:9 ratio (~218 ppi density)
OS
K31
Android 10, LG UX 9.1
K4
Android 5.1.1 (Lollipop)
Chipset
K31
Mediatek MT6762 Helio P22 (12 nm)
K4
Mediatek MT6735M - K120E, K130EQualcomm MSM8909 Snapdragon 210 (28 nm) - K121
CPU
K31
Octa-core 2.0 GHz Cortex-A53
K4
Quad-core 1.0 GHz Cortex-A53 - K120E, K130EQuad-core 1.1 GHz Cortex-A7 - K121
GPU
K31
PowerVR GE8320
K4
Mali-T720MP2 - K120E, K130EAdreno 304 - K121
Card slot
K31
microSDXC
K4
microSDHC (dedicated slot)
Internal
K31
32GB 2GB RAM
K4
8GB 1GB RAM
Other
K31
eMMC 5.1
K4
eMMC 4.5
Dual
K31
13 MP, f/1.8, 27mm (wide), 1/3.1", 1.12µm, PDAF 5 MP, f/2.2, 120˚ (ultrawide), 1/5.0", 1.12µm
K4
-
Features
K31
LED flash, panorama, HDR
K4
LED flash
Video
K31
1080p@30fps
K4
720p@30fps
Single
K31
-
K4
5 MP, f/2.8, AF
Single
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
K4
2 MP, f/2.8
Video
K31
1080p@30fps
K4
Loudspeaker
K31
Yes
K4
Yes
3.5mm jack
K31
Yes
K4
Yes
WLAN
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
K4
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Bluetooth
K31
5.0, A2DP, LE
K4
4.1, A2DP, LE
Positioning
K31
GPS
K4
GPS, GLONASS
NFC
K31
No
K4
No
Radio
K31
No
K4
FM radio, RDS
USB
K31
microUSB 2.0
K4
microUSB 2.0
Sensors
K31
Fingerprint (rear-mounted), accelerometer
K4
Accelerometer, proximity
Type
K31
Li-Ion 3000 mAh
K4
Li-Ion 1940 mAh, removable
Stand-by
K31
-
K4
Up to 510 h (2G) / Up to 500 h (3G)
Talk time
K31
-
K4
Up to 20 h (2G) / Up to 9 h (3G)
Colors
K31
Gray
K4
White, Indigo
Models
K31
LM-K300Q, LMK300, LGL355DL
K4
K130, K120, K121
Price
K31
About 130 EUR
K4
About 100 EUR