Screen size
K31Winner: 5.7"+30%
Viper 4G LTE LS8404.0"
Quick verdict
K31 leads the measured specs 11-2.
Measured wins
K31
11
spec wins
Overall winner
Ties
4
equal specs
Viper 4G LTE LS840
2
spec wins
Screen size
Technology
K31
GSM / CDMA / HSPA / LTE
Viper 4G LTE LS840
CDMA / EVDO / LTE
2G bands
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
Viper 4G LTE LS840
CDMA 800 / 1900
3G bands
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Viper 4G LTE LS840
CDMA2000 1xEV-DO
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
Viper 4G LTE LS840
25
Speed
K31
HSPA, LTE
Viper 4G LTE LS840
EV-DO Rev.A 3.1 Mbps, LTE
Announced
K31
2020, August 21. Released 2020, August 21
Viper 4G LTE LS840
2012, January. Released 2012, April
Status
K31
Discontinued
Viper 4G LTE LS840
Discontinued
Dimensions
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
Viper 4G LTE LS840
117 x 62 x 11.7 mm (4.61 x 2.44 x 0.46 in)
Weight
K31
146 g (5.15 oz)
Viper 4G LTE LS840
142 g (5.01 oz)
SIM
K31
Nano-SIM + Nano-SIM
Viper 4G LTE LS840
Mini-SIM
Other
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Viper 4G LTE LS840
-
Type
K31
IPS LCD
Viper 4G LTE LS840
TFT
Size
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
Viper 4G LTE LS840
4.0 inches, 45.5 cm2 (~62.8% screen-to-body ratio)
Resolution
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
Viper 4G LTE LS840
480 x 800 pixels, 5:3 ratio (~233 ppi density)
OS
K31
Android 10, LG UX 9.1
Viper 4G LTE LS840
Android 2.3 (Gingerbread)
Chipset
K31
Mediatek MT6762 Helio P22 (12 nm)
Viper 4G LTE LS840
-
CPU
K31
Octa-core 2.0 GHz Cortex-A53
Viper 4G LTE LS840
Dual-core 1.2 GHz
GPU
K31
PowerVR GE8320
Viper 4G LTE LS840
Adreno 220
Card slot
K31
microSDXC
Viper 4G LTE LS840
microSDHC (dedicated slot), 4 GB included
Internal
K31
32GB 2GB RAM
Viper 4G LTE LS840
4GB (1.7GB user available), 1GB RAM
Other
K31
eMMC 5.1
Viper 4G LTE LS840
-
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
Viper 4G LTE LS840
-
Features
K31
LED flash, panorama, HDR
Viper 4G LTE LS840
LED flash
Video
K31
1080p@30fps
Viper 4G LTE LS840
1080p@30fps
Single
K31
-
Viper 4G LTE LS840
5 MP, AF
Single
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
Viper 4G LTE LS840
VGA
Video
K31
1080p@30fps
Viper 4G LTE LS840
Loudspeaker
K31
Yes
Viper 4G LTE LS840
Yes
3.5mm jack
K31
Yes
Viper 4G LTE LS840
Yes
WLAN
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Viper 4G LTE LS840
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot, DLNA
Bluetooth
K31
5.0, A2DP, LE
Viper 4G LTE LS840
3.0, A2DP
Positioning
K31
GPS
Viper 4G LTE LS840
GPS, A-GPS
NFC
K31
No
Viper 4G LTE LS840
Yes
Radio
K31
No
Viper 4G LTE LS840
No
USB
K31
microUSB 2.0
Viper 4G LTE LS840
microUSB 2.0
Sensors
K31
Fingerprint (rear-mounted), accelerometer
Viper 4G LTE LS840
Accelerometer, proximity, compass
Other
K31
-
Viper 4G LTE LS840
MP4/H.264/WMV player MP3/WAV/WMA/eAAC+ player Document viewer Organizer Voice memo/dial Predictive text input (Swype)
Type
K31
Li-Ion 3000 mAh
Viper 4G LTE LS840
Removable Li-Ion 1700 mAh battery
Talk time
K31
-
Viper 4G LTE LS840
Up to 7 h
Colors
K31
Gray
Viper 4G LTE LS840
Black
Models
K31
LM-K300Q, LMK300, LGL355DL
Viper 4G LTE LS840
-
Price
K31
About 130 EUR
Viper 4G LTE LS840
About 140 EUR
SAR
K31
-
Viper 4G LTE LS840
1.05 W/kg (head) 1.16 W/kg (body)