Screen size
K31Winner: 5.7"+21%
Nitro HD4.5"
Quick verdict
K31 leads the measured specs 11-2.
Measured wins
K31
11
spec wins
Overall winner
Ties
4
equal specs
Nitro HD
2
spec wins
Screen size
Technology
K31
GSM / CDMA / HSPA / LTE
Nitro HD
GSM / HSPA / LTE
2G bands
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
Nitro HD
GSM 850 / 900 / 1800 / 1900
3G bands
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Nitro HD
HSDPA 850 / 1900 / 2100
4G bands
K31
2, 4, 5, 12, 13, 25, 26, 41, 66, 71
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
3.5mm jack
equal specsSD card
equal specsStereo speakers
Nitro HD
17
Speed
K31
HSPA, LTE
Nitro HD
HSPA 21.1/5.76 Mbps, LTE
Announced
K31
2020, August 21. Released 2020, August 21
Nitro HD
2011, November. Released 2011, December
Status
K31
Discontinued
Nitro HD
Discontinued
Dimensions
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
Nitro HD
133.9 x 67.8 x 10.4 mm (5.27 x 2.67 x 0.41 in)
Weight
K31
146 g (5.15 oz)
Nitro HD
127 g (4.48 oz)
SIM
K31
Nano-SIM + Nano-SIM
Nitro HD
Mini-SIM
Other
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Nitro HD
-
Type
K31
IPS LCD
Nitro HD
AH-IPS LCD
Size
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
Nitro HD
4.5 inches, 55.8 cm2 (~61.5% screen-to-body ratio)
Resolution
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
Nitro HD
720 x 1280 pixels, 16:9 ratio (~326 ppi density)
OS
K31
Android 10, LG UX 9.1
Nitro HD
Android 2.3.5 (Gingerbread), upgradable to 4.0 (Ice Cream Sandwich)
Chipset
K31
Mediatek MT6762 Helio P22 (12 nm)
Nitro HD
-
CPU
K31
Octa-core 2.0 GHz Cortex-A53
Nitro HD
Dual-core 1.5 GHz Scorpion
GPU
K31
PowerVR GE8320
Nitro HD
Adreno 220
Card slot
K31
microSDXC
Nitro HD
microSDHC (dedicated slot), 16 GB included
Internal
K31
32GB 2GB RAM
Nitro HD
4GB 1GB RAM
Other
K31
eMMC 5.1
Nitro HD
-
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
Nitro HD
-
Features
K31
LED flash, panorama, HDR
Nitro HD
LED flash
Video
K31
1080p@30fps
Nitro HD
1080p@30fps
Single
K31
-
Nitro HD
8 MP, AF
Single
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
Nitro HD
Yes
Video
K31
1080p@30fps
Nitro HD
Loudspeaker
K31
Yes
Nitro HD
Yes
3.5mm jack
K31
Yes
Nitro HD
Yes
WLAN
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Nitro HD
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, DLNA, hotspot
Bluetooth
K31
5.0, A2DP, LE
Nitro HD
3.0, A2DP
Positioning
K31
GPS
Nitro HD
GPS, A-GPS
NFC
K31
No
Nitro HD
-
Radio
K31
No
Nitro HD
No
USB
K31
microUSB 2.0
Nitro HD
microUSB 2.0
Sensors
K31
Fingerprint (rear-mounted), accelerometer
Nitro HD
Accelerometer, gyro, proximity, compass
Other
K31
-
Nitro HD
MP4/H.264/WMV player MP3/WAV/WMA/eAAC+ player Document viewer/editor Organizer Voice memo/dial/commands Predictive text input
Type
K31
Li-Ion 3000 mAh
Nitro HD
Removable Li-Ion 1830 mAh battery
Stand-by
K31
-
Nitro HD
Up to 252 h (3G)
Talk time
K31
-
Nitro HD
Up to 3 h (3G)
Colors
K31
Gray
Nitro HD
Black
Models
K31
LM-K300Q, LMK300, LGL355DL
Nitro HD
-
Price
K31
About 130 EUR
Nitro HD
About 170 EUR
SAR
K31
-
Nitro HD
0.67 W/kg (head) 1.12 W/kg (body)