Screen size
A3902.2"
K31Winner: 5.7"+61%
Quick verdict
K31 leads the measured specs 11-1.
Measured wins
A390
1
spec wins
Ties
5
equal specs
K31
11
spec wins
Overall winner
Screen size
Technology
A390
GSM
K31
GSM / CDMA / HSPA / LTE
2G bands
A390
GSM 850 / 900 / 1800 / 1900 - SIM1 & SIM 2
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
GPRS
A390
Class 12
K31
-
EDGE
A390
No
K31
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
-
3G bands
A390
-
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
A390
-
K31
2, 4, 5, 12, 13, 25, 26, 41, 66, 71
Speed
A390
-
K31
HSPA, LTE
Announced
A390
2013. Released 2013
K31
2020, August 21. Released 2020, August 21
Status
A390
Discontinued
K31
Discontinued
Dimensions
A390
114.4 x 51.8 x 13.2 mm (4.50 x 2.04 x 0.52 in)
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
Weight
A390
92 g (3.25 oz)
K31
146 g (5.15 oz)
SIM
A390
Dual SIM (Mini-SIM, dual stand-by)
K31
Nano-SIM + Nano-SIM
Other
A390
-
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Type
A390
TFT
K31
IPS LCD
Size
A390
2.2 inches, 15.0 cm2 (~25.3% screen-to-body ratio)
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
Resolution
A390
240 x 320 pixels, 4:3 ratio (~182 ppi density)
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
Chipset
A390
Mediatek MT6255
K31
Mediatek MT6762 Helio P22 (12 nm)
CPU
A390
416 MHz
K31
Octa-core 2.0 GHz Cortex-A53
OS
A390
-
K31
Android 10, LG UX 9.1
GPU
A390
-
K31
PowerVR GE8320
Card slot
A390
microSDHC (dedicated slot)
K31
microSDXC
Phonebook
A390
1000 entries
K31
-
Call records
A390
Yes
K31
-
Internal
A390
40MB
K31
32GB 2GB RAM
Other
A390
-
K31
eMMC 5.1
Single
A390
1.3 MP
K31
-
Video
A390
Yes
K31
1080p@30fps
Dual
A390
-
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
Features
A390
-
K31
LED flash, panorama, HDR
Other
A390
No
K31
-
Single
A390
-
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
Video
A390
-
K31
1080p@30fps
Loudspeaker
A390
Yes
K31
Yes
3.5mm jack
A390
Yes
K31
Yes
WLAN
A390
No
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
A390
2.1, EDR
K31
5.0, A2DP, LE
Positioning
A390
No
K31
GPS
NFC
A390
No
K31
No
Radio
A390
FM radio, recording
K31
No
USB
A390
2.0
K31
microUSB 2.0
Sensors
A390
K31
Fingerprint (rear-mounted), accelerometer
Messaging
A390
SMS, MMS
K31
-
Games
A390
Yes
K31
-
Java
A390
Yes
K31
-
Other
A390
MP3/WAV/AAC player MP4/H.263 player Organizer Predictive text input
K31
-
Type
A390
Li-Ion 1700 mAh, removable
K31
Li-Ion 3000 mAh
Stand-by
A390
Up to 800 h
K31
-
Talk time
A390
Up to 15 h
K31
-
Colors
A390
Black
K31
Gray
Price
A390
About 40 EUR
K31
About 130 EUR
Models
A390
-
K31
LM-K300Q, LMK300, LGL355DL