Screen size
K31Winner: 5.7"+61%
U85502.2"
Quick verdict
K31 leads the measured specs 14-2.
Measured wins
K31
14
spec wins
Overall winner
Ties
2
equal specs
U8550
2
spec wins
Screen size
Technology
K31
GSM / CDMA / HSPA / LTE
U8550
GSM / UMTS
2G bands
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
U8550
GSM 900 / 1800 / 1900
3G bands
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
U8550
UMTS 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
5G support
equal specsNFC
3.5mm jack
SD card
equal specsStereo speakers
U8550
-
Speed
K31
HSPA, LTE
U8550
Yes, 384 kbps
Announced
K31
2020, August 21. Released 2020, August 21
U8550
2006, February
Status
K31
Discontinued
U8550
Discontinued
Dimensions
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
U8550
90 x 55 x 24.7 mm (3.54 x 2.17 x 0.97 in)
Weight
K31
146 g (5.15 oz)
U8550
135 g (4.76 oz)
SIM
K31
Nano-SIM + Nano-SIM
U8550
Mini-SIM
Other
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
U8550
-
Type
K31
IPS LCD
U8550
TFT, 256K colors
Size
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
U8550
2.2 inches, 15.6 cm2 (~31.5% screen-to-body ratio)
Resolution
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
U8550
220 x 220 pixels, 1:1 ratio (~141 ppi density)
Other
K31
-
U8550
Second external TFT display, 65K colors, (128 x 160 pixels), 1.3 inches Downloadable wallpapers
OS
K31
Android 10, LG UX 9.1
U8550
-
Chipset
K31
Mediatek MT6762 Helio P22 (12 nm)
U8550
-
CPU
K31
Octa-core 2.0 GHz Cortex-A53
U8550
-
GPU
K31
PowerVR GE8320
U8550
-
Card slot
K31
microSDXC
U8550
microSD (dedicated slot)
Internal
K31
32GB 2GB RAM
U8550
20MB
Other
K31
eMMC 5.1
U8550
-
Phonebook
K31
-
U8550
Yes
Call records
K31
-
U8550
10 dialed, 10 received, 10 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
U8550
-
Features
K31
LED flash, panorama, HDR
U8550
LED flash
Video
K31
1080p@30fps
U8550
Yes
Single
K31
-
U8550
1.3 MP
Single
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
U8550
VGA videocall camera
Video
K31
1080p@30fps
U8550
Loudspeaker
K31
Yes
U8550
Yes, with stereo speakers
3.5mm jack
K31
Yes
U8550
No
Alert types
K31
-
U8550
Vibration; Downloadable polyphonic, MP3, AAC ringtones
Other
K31
-
U8550
3D surround
WLAN
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
U8550
No
Bluetooth
K31
5.0, A2DP, LE
U8550
Yes
Positioning
K31
GPS
U8550
No
NFC
K31
No
U8550
-
Radio
K31
No
U8550
No
USB
K31
microUSB 2.0
U8550
Proprietary
Sensors
K31
Fingerprint (rear-mounted), accelerometer
U8550
Messaging
K31
-
U8550
SMS, MMS, Email
Browser
K31
-
U8550
WAP 2.0/xHTML
Games
K31
-
U8550
Yes + downloadable
Java
K31
-
U8550
Yes, MIDP 2.0
Other
K31
-
U8550
MP3/AAC/MP4 player Predictive text input Organizer
Type
K31
Li-Ion 3000 mAh
U8550
Removable Li-Ion 1440 mAh battery
Stand-by
K31
-
U8550
Up to 220 h
Colors
K31
Gray
U8550
Orange, Green, Silver
Models
K31
LM-K300Q, LMK300, LGL355DL
U8550
-
Price
K31
About 130 EUR
U8550
-