Screen size
Joy4.0"
K31Winner: 5.7"+30%
Quick verdict
K31 leads the measured specs 11-1.
Measured wins
Joy
1
spec wins
Ties
5
equal specs
K31
11
spec wins
Overall winner
Screen size
Technology
Joy
GSM / HSPA / LTE
K31
GSM / CDMA / HSPA / LTE
2G bands
Joy
GSM 850 / 900 / 1800 / 1900
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
3G bands
Joy
HSDPA 850 / 900 / 2100
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
Joy
3, 7, 8, 20
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
K31
2, 4, 5, 12, 13, 25, 26, 41, 66, 71
Speed
Joy
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
K31
HSPA, LTE
Announced
Joy
2015, February. Released 2015, May
K31
2020, August 21. Released 2020, August 21
Status
Joy
Discontinued
K31
Discontinued
Dimensions
Joy
122.7 x 64 x 11.9 mm (4.83 x 2.52 x 0.47 in)
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
Weight
Joy
128 g (4.52 oz)
K31
146 g (5.15 oz)
SIM
Joy
Micro-SIM
K31
Nano-SIM + Nano-SIM
Other
Joy
-
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Type
Joy
TFT
K31
IPS LCD
Size
Joy
4.0 inches, 45.5 cm2 (~58.0% screen-to-body ratio)
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
Resolution
Joy
480 x 800 pixels, 5:3 ratio (~233 ppi density)
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
OS
Joy
Android 4.4 (KitKat)
K31
Android 10, LG UX 9.1
Chipset
Joy
Qualcomm MSM8210 Snapdragon 200 (28 nm)
K31
Mediatek MT6762 Helio P22 (12 nm)
CPU
Joy
Dual-core 1.2 GHz Cortex-A7
K31
Octa-core 2.0 GHz Cortex-A53
GPU
Joy
Adreno 302
K31
PowerVR GE8320
Card slot
Joy
microSDHC (dedicated slot)
K31
microSDXC
Internal
Joy
4GB 512MB RAM
K31
32GB 2GB RAM
Other
Joy
eMMC 4.5
K31
eMMC 5.1
Single
Joy
5 MP
K31
-
Features
Joy
LED flash
K31
LED flash, panorama, HDR
Video
Joy
Yes
K31
1080p@30fps
Dual
Joy
-
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
Single
Joy
VGA
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
Video
Joy
K31
1080p@30fps
Loudspeaker
Joy
Yes
K31
Yes
3.5mm jack
Joy
Yes
K31
Yes
WLAN
Joy
Wi-Fi 802.11 b/g/n, hotspot
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
Joy
4.0, A2DP
K31
5.0, A2DP, LE
Positioning
Joy
GPS
K31
GPS
NFC
Joy
No
K31
No
Radio
Joy
FM radio, RDS
K31
No
USB
Joy
microUSB 2.0
K31
microUSB 2.0
Sensors
Joy
Accelerometer
K31
Fingerprint (rear-mounted), accelerometer
Type
Joy
Li-Ion 1900 mAh, removable
K31
Li-Ion 3000 mAh
Stand-by
Joy
Up to 518 h (2G) / Up to 641 h (3G)
K31
-
Colors
Joy
Dark blue, White
K31
Gray
Models
Joy
H220
K31
LM-K300Q, LMK300, LGL355DL
SAR EU
Joy
1.25 W/kg (head) 1.10 W/kg (body)
K31
-
Price
Joy
About 90 EUR
K31
About 130 EUR