Screen size
BL40 New Chocolate4.0"
K31Winner: 5.7"+30%
Quick verdict
K31 leads the measured specs 12-1.
Measured wins
BL40 New Chocolate
1
spec wins
Ties
4
equal specs
K31
12
spec wins
Overall winner
Screen size
Technology
BL40 New Chocolate
GSM / HSPA
K31
GSM / CDMA / HSPA / LTE
2G bands
BL40 New Chocolate
GSM 850 / 900 / 1800 / 1900
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
3G bands
BL40 New Chocolate
HSDPA 900 / 2100
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Speed
BL40 New Chocolate
HSPA 7.2/0.384 Mbps
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
K31
HSPA, LTE
4G bands
BL40 New Chocolate
-
K31
2, 4, 5, 12, 13, 25, 26, 41, 66, 71
Announced
BL40 New Chocolate
2009, August. Released 2009, September
K31
2020, August 21. Released 2020, August 21
Status
BL40 New Chocolate
Discontinued
K31
Discontinued
Dimensions
BL40 New Chocolate
128 x 51 x 10.9 mm (5.04 x 2.01 x 0.43 in)
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
Weight
BL40 New Chocolate
129 g (4.55 oz)
K31
146 g (5.15 oz)
SIM
BL40 New Chocolate
Mini-SIM
K31
Nano-SIM + Nano-SIM
Other
BL40 New Chocolate
-
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Type
BL40 New Chocolate
TFT
K31
IPS LCD
Size
BL40 New Chocolate
4.01 inches, 37.7 cm2 (~57.8% screen-to-body ratio)
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
Resolution
BL40 New Chocolate
345 x 800 pixels, 21:9 ratio (~217 ppi density)
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
Protection
BL40 New Chocolate
Corning Gorilla Glass
K31
-
Other
BL40 New Chocolate
S-Class Touch UI
K31
-
Card slot
BL40 New Chocolate
microSDHC (dedicated slot)
K31
microSDXC
Phonebook
BL40 New Chocolate
1000 entries, Photo call
K31
-
Call records
BL40 New Chocolate
Yes
K31
-
Internal
BL40 New Chocolate
1.1GB
K31
32GB 2GB RAM
Other
BL40 New Chocolate
-
K31
eMMC 5.1
Single
BL40 New Chocolate
5 MP, AF
K31
-
Features
BL40 New Chocolate
Schneider-Kreuznach optics, LED flash
K31
LED flash, panorama, HDR
Video
BL40 New Chocolate
480p@30fps
K31
1080p@30fps
Dual
BL40 New Chocolate
-
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
BL40 New Chocolate
Yes
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
Video
BL40 New Chocolate
K31
1080p@30fps
Loudspeaker
BL40 New Chocolate
Yes
K31
Yes
3.5mm jack
BL40 New Chocolate
Yes
K31
Yes
WLAN
BL40 New Chocolate
Wi-Fi 802.11 b/g, DLNA
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
BL40 New Chocolate
2.1, A2DP
K31
5.0, A2DP, LE
Positioning
BL40 New Chocolate
GPS, A-GPS
K31
GPS
Radio
BL40 New Chocolate
Stereo FM radio, RDS; FM transmitter
K31
No
USB
BL40 New Chocolate
microUSB 2.0
K31
microUSB 2.0
NFC
BL40 New Chocolate
-
K31
No
Sensors
BL40 New Chocolate
Accelerometer, proximity
K31
Fingerprint (rear-mounted), accelerometer
Messaging
BL40 New Chocolate
SMS, EMS, MMS, Email, IM
K31
-
Browser
BL40 New Chocolate
WAP 2.0/xHTML, HTML
K31
-
Games
BL40 New Chocolate
7 incl. motion-based + downloadable
K31
-
Java
BL40 New Chocolate
Yes, MIDP 2.0
K31
-
Other
BL40 New Chocolate
MP4/DivX/XviD/H.263 player MP3/WAV/eAAC+ player Document viewer Organiser TV out Predictive text input
K31
-
Type
BL40 New Chocolate
Removable Li-Ion 1000 mAh battery
K31
Li-Ion 3000 mAh
Stand-by
BL40 New Chocolate
Up to 400 h (2G) / Up to 370 h (3G)
K31
-
Talk time
BL40 New Chocolate
Up to 6 h (2G) / Up to 5 h (3G)
K31
-
Colors
BL40 New Chocolate
Black
K31
Gray
SAR
BL40 New Chocolate
0.21 W/kg (head) 0.62 W/kg (body)
K31
-
SAR EU
BL40 New Chocolate
0.76 W/kg (head)
K31
-
Price
BL40 New Chocolate
About 100 EUR
K31
About 130 EUR
Models
BL40 New Chocolate
-
K31
LM-K300Q, LMK300, LGL355DL
OS
BL40 New Chocolate
-
K31
Android 10, LG UX 9.1
Chipset
BL40 New Chocolate
-
K31
Mediatek MT6762 Helio P22 (12 nm)
CPU
BL40 New Chocolate
-
K31
Octa-core 2.0 GHz Cortex-A53
GPU
BL40 New Chocolate
-
K31
PowerVR GE8320