Screen size
K31Winner: 5.7"+58%
KF757 Secret2.4"
Quick verdict
K31 leads the measured specs 13-1.
Measured wins
K31
13
spec wins
Overall winner
Ties
3
equal specs
KF757 Secret
1
spec wins
Screen size
Technology
K31
GSM / CDMA / HSPA / LTE
KF757 Secret
GSM / HSPA
2G bands
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
KF757 Secret
GSM 900 / 1800 / 1900
3G bands
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
KF757 Secret
HSDPA 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
SD card
equal specsStereo speakers
KF757 Secret
-
Speed
K31
HSPA, LTE
KF757 Secret
HSPA 3.6/0.384 Mbps
Announced
K31
2020, August 21. Released 2020, August 21
KF757 Secret
2008, April. Released 2008, June
Status
K31
Discontinued
KF757 Secret
Discontinued
Dimensions
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
KF757 Secret
102.8 x 50.8 x 11.8 mm (4.05 x 2.0 x 0.46 in)
Weight
K31
146 g (5.15 oz)
KF757 Secret
116 g (4.09 oz)
SIM
K31
Nano-SIM + Nano-SIM
KF757 Secret
Mini-SIM
Other
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
KF757 Secret
-
Type
K31
IPS LCD
KF757 Secret
TFT resistive touchscreen, 256K colors
Size
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
KF757 Secret
2.4 inches, 17.8 cm2 (~34.2% screen-to-body ratio)
Resolution
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
KF757 Secret
240 x 320 pixels, 4:3 ratio (~167 ppi density)
Protection
K31
-
KF757 Secret
Scratch-resistant glass
Other
K31
-
KF757 Secret
Limited touchscreen functionality
OS
K31
Android 10, LG UX 9.1
KF757 Secret
-
Chipset
K31
Mediatek MT6762 Helio P22 (12 nm)
KF757 Secret
-
CPU
K31
Octa-core 2.0 GHz Cortex-A53
KF757 Secret
-
GPU
K31
PowerVR GE8320
KF757 Secret
-
Card slot
K31
microSDXC
KF757 Secret
microSDHC (dedicated slot)
Internal
K31
32GB 2GB RAM
KF757 Secret
100MB
Other
K31
eMMC 5.1
KF757 Secret
-
Phonebook
K31
-
KF757 Secret
1000 entries, Photocall
Call records
K31
-
KF757 Secret
40 dialed, 40 received, 40 missed calls
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
KF757 Secret
-
Features
K31
LED flash, panorama, HDR
KF757 Secret
LED flash
Video
K31
1080p@30fps
KF757 Secret
480p@30fps, 320p@120fps
Single
K31
-
KF757 Secret
5 MP, AF
Single
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
KF757 Secret
-
Video
K31
1080p@30fps
KF757 Secret
-
Other
K31
-
KF757 Secret
Videocall camera
Loudspeaker
K31
Yes
KF757 Secret
Yes
3.5mm jack
K31
Yes
KF757 Secret
No
WLAN
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
KF757 Secret
Wi-Fi 802.11 b/g
Bluetooth
K31
5.0, A2DP, LE
KF757 Secret
2.0, A2DP
Positioning
K31
GPS
KF757 Secret
No
NFC
K31
No
KF757 Secret
-
Radio
K31
No
KF757 Secret
Stereo FM radio, RDS
USB
K31
microUSB 2.0
KF757 Secret
2.0
Sensors
K31
Fingerprint (rear-mounted), accelerometer
KF757 Secret
Accelerometer
Messaging
K31
-
KF757 Secret
SMS, EMS, MMS, Email
Browser
K31
-
KF757 Secret
WAP 2.0/xHTML, HTML
Games
K31
-
KF757 Secret
6, incl. motion-based + downloadable
Java
K31
-
KF757 Secret
Yes, MIDP 2.0
Other
K31
-
KF757 Secret
Carbon fiber battery cover MP3/WMA/AAC/AAC+ player MP4/DivX(up to 640x480) player Document viewer (Word, Excel, PowerPoint, PDF) Organizer Voice memo TV-out Predictive text input
Type
K31
Li-Ion 3000 mAh
KF757 Secret
Removable Li-Ion 800 mAh battery
Stand-by
K31
-
KF757 Secret
Up to 220 h
Talk time
K31
-
KF757 Secret
Up to 3 h 30 min
Colors
K31
Gray
KF757 Secret
Black, Ruby Violet, Titan Gold
Models
K31
LM-K300Q, LMK300, LGL355DL
KF757 Secret
-
Price
K31
About 130 EUR
KF757 Secret
About 110 EUR
SAR
K31
-
KF757 Secret
0.53 W/kg (head) 0.24 W/kg (body)