Screen size
C900 Optimus 7Q3.5"
K31Winner: 5.7"+39%
Quick verdict
K31 leads the measured specs 14-0.
Measured wins
C900 Optimus 7Q
0
spec wins
Ties
3
equal specs
K31
14
spec wins
Overall winner
Screen size
Technology
C900 Optimus 7Q
GSM / HSPA
K31
GSM / CDMA / HSPA / LTE
2G bands
C900 Optimus 7Q
GSM 850 / 900 / 1800 / 1900
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
3G bands
C900 Optimus 7Q
HSDPA 900 / 1900 / 2100 , HSDPA 850 / 1900 / 2100 - North America
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Speed
C900 Optimus 7Q
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
Stereo speakers
K31
HSPA, LTE
4G bands
C900 Optimus 7Q
-
K31
2, 4, 5, 12, 13, 25, 26, 41, 66, 71
Announced
C900 Optimus 7Q
2010, October. Released 2010, October
K31
2020, August 21. Released 2020, August 21
Status
C900 Optimus 7Q
Discontinued
K31
Discontinued
Dimensions
C900 Optimus 7Q
119.5 x 59.5 x 15.2 mm (4.70 x 2.34 x 0.60 in)
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
Weight
C900 Optimus 7Q
178 g (6.28 oz)
K31
146 g (5.15 oz)
Keyboard
C900 Optimus 7Q
QWERTY
K31
-
SIM
C900 Optimus 7Q
Mini-SIM
K31
Nano-SIM + Nano-SIM
Other
C900 Optimus 7Q
-
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Type
C900 Optimus 7Q
TFT
K31
IPS LCD
Size
C900 Optimus 7Q
3.5 inches, 34.9 cm2 (~49.0% screen-to-body ratio)
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
Resolution
C900 Optimus 7Q
480 x 800 pixels, 5:3 ratio (~267 ppi density)
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
Protection
C900 Optimus 7Q
Corning Gorilla Glass
K31
-
OS
C900 Optimus 7Q
Microsoft Windows Phone 7
K31
Android 10, LG UX 9.1
Chipset
C900 Optimus 7Q
Qualcomm QSD8650 Snapdragon S1
K31
Mediatek MT6762 Helio P22 (12 nm)
CPU
C900 Optimus 7Q
1.0 GHz Scorpion
K31
Octa-core 2.0 GHz Cortex-A53
GPU
C900 Optimus 7Q
Adreno 200
K31
PowerVR GE8320
Card slot
C900 Optimus 7Q
No
K31
microSDXC
Internal
C900 Optimus 7Q
16GB 512MB RAM
K31
32GB 2GB RAM
Other
C900 Optimus 7Q
-
K31
eMMC 5.1
Single
C900 Optimus 7Q
5 MP, AF
K31
-
Features
C900 Optimus 7Q
LED flash
K31
LED flash, panorama, HDR
Video
C900 Optimus 7Q
720p
K31
1080p@30fps
Dual
C900 Optimus 7Q
-
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
Other
C900 Optimus 7Q
No
K31
-
Single
C900 Optimus 7Q
-
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
Video
C900 Optimus 7Q
-
K31
1080p@30fps
Loudspeaker
C900 Optimus 7Q
Yes
K31
Yes
3.5mm jack
C900 Optimus 7Q
Yes
K31
Yes
WLAN
C900 Optimus 7Q
Wi-Fi 802.11 b/g/n, DLNA
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
C900 Optimus 7Q
2.1, A2DP
K31
5.0, A2DP, LE
Positioning
C900 Optimus 7Q
GPS, A-GPS
K31
GPS
Radio
C900 Optimus 7Q
Stereo FM radio
K31
No
USB
C900 Optimus 7Q
microUSB 2.0
K31
microUSB 2.0
NFC
C900 Optimus 7Q
-
K31
No
Sensors
C900 Optimus 7Q
Accelerometer, proximity, compass
K31
Fingerprint (rear-mounted), accelerometer
Browser
C900 Optimus 7Q
HTML
K31
-
Other
C900 Optimus 7Q
MP4/H.264/WMV player MP3/WAV/WMA/eAAC+ player Organizer Document viewer/editor Voice memo Predictive text input
K31
-
Type
C900 Optimus 7Q
Removable Li-Ion 1500 mAh battery
K31
Li-Ion 3000 mAh
Stand-by
C900 Optimus 7Q
Up to 350 h
K31
-
Talk time
C900 Optimus 7Q
Up to 7 h
K31
-
Colors
C900 Optimus 7Q
Black
K31
Gray
SAR
C900 Optimus 7Q
0.35 W/kg (head) 0.30 W/kg (body)
K31
-
Models
C900 Optimus 7Q
-
K31
LM-K300Q, LMK300, LGL355DL
Price
C900 Optimus 7Q
-
K31
About 130 EUR