Screen size
GD900 Crystal3.0"
K31Winner: 5.7"+47%
Quick verdict
K31 leads the measured specs 12-2.
Measured wins
GD900 Crystal
2
spec wins
Ties
3
equal specs
K31
12
spec wins
Overall winner
Screen size
Technology
GD900 Crystal
GSM / HSPA
K31
GSM / CDMA / HSPA / LTE
2G bands
GD900 Crystal
GSM 850 / 900 / 1800 / 1900
K31
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
3G bands
GD900 Crystal
HSDPA 900 / 2100 , HSDPA 850 / 2100
K31
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Speed
GD900 Crystal
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
SD card
equal specsStereo speakers
K31
HSPA, LTE
4G bands
GD900 Crystal
-
K31
2, 4, 5, 12, 13, 25, 26, 41, 66, 71
Announced
GD900 Crystal
2009, April. Released 2009, July
K31
2020, August 21. Released 2020, August 21
Status
GD900 Crystal
Discontinued
K31
Discontinued
Dimensions
GD900 Crystal
105 x 52.5 x 13.5 mm (4.13 x 2.07 x 0.53 in)
K31
147.8 x 71.1 x 8.6 mm (5.82 x 2.80 x 0.34 in)
Weight
GD900 Crystal
127 g (4.48 oz)
K31
146 g (5.15 oz)
SIM
GD900 Crystal
Mini-SIM
K31
Nano-SIM + Nano-SIM
Other
GD900 Crystal
-
K31
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Type
GD900 Crystal
TFT
K31
IPS LCD
Size
GD900 Crystal
3.0 inches, 25.6 cm2 (~46.5% screen-to-body ratio)
K31
5.7 inches, 81.1 cm2 (~77.2% screen-to-body ratio)
Resolution
GD900 Crystal
480 x 800 pixels, 5:3 ratio (~311 ppi density)
K31
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
Protection
GD900 Crystal
Corning Gorilla Glass
K31
-
Other
GD900 Crystal
S-Class Touch UI Transparent touch-sensitive keypad Gesture shortcut Handwriting recognition
K31
-
Card slot
GD900 Crystal
microSDHC (dedicated slot)
K31
microSDXC
Phonebook
GD900 Crystal
1000 contacts, Photocall
K31
-
Call records
GD900 Crystal
Yes
K31
-
Internal
GD900 Crystal
1.5GB
K31
32GB 2GB RAM
Other
GD900 Crystal
-
K31
eMMC 5.1
Single
GD900 Crystal
8 MP, AF
K31
-
Features
GD900 Crystal
LED flash
K31
LED flash, panorama, HDR
Video
GD900 Crystal
480p@30fps
K31
1080p@30fps
Dual
GD900 Crystal
-
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
GD900 Crystal
Videocall camera
K31
-
Single
GD900 Crystal
-
K31
5 MP, f/2.2, 24mm (wide), 1/5.0", 1.12µm
Video
GD900 Crystal
-
K31
1080p@30fps
Loudspeaker
GD900 Crystal
Yes
K31
Yes
3.5mm jack
GD900 Crystal
No
K31
Yes
WLAN
GD900 Crystal
Wi-Fi 802.11 b/g
K31
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
GD900 Crystal
2.1, A2DP
K31
5.0, A2DP, LE
Positioning
GD900 Crystal
No
K31
GPS
Radio
GD900 Crystal
FM radio
K31
No
USB
GD900 Crystal
microUSB 2.0
K31
microUSB 2.0
NFC
GD900 Crystal
-
K31
No
Sensors
GD900 Crystal
Accelerometer, proximity
K31
Fingerprint (rear-mounted), accelerometer
Messaging
GD900 Crystal
SMS, EMS, MMS, EMail, Instant Messaging
K31
-
Browser
GD900 Crystal
WAP 2.0/xHTML, HTML
K31
-
Games
GD900 Crystal
Yes, 2
K31
-
Java
GD900 Crystal
Yes, MIDP 2.0
K31
-
Other
GD900 Crystal
TV-out MP3/AAC/AAC+/WMA player DivX/XviD/MP4 player Organizer Document viewer (DOC, XLS, PDF) Voice memo Predictive text input
K31
-
Type
GD900 Crystal
Removable Li-Ion 1000 mAh battery
K31
Li-Ion 3000 mAh
Stand-by
GD900 Crystal
Up to 300 h
K31
-
Talk time
GD900 Crystal
Up to 6 h (2G) / Up to 4 h (3G)
K31
-
Colors
GD900 Crystal
K31
Gray
SAR
GD900 Crystal
1.12 W/kg (head) 0.47 W/kg (body)
K31
-
SAR EU
GD900 Crystal
0.60 W/kg (head)
K31
-
Price
GD900 Crystal
About 130 EUR
K31
About 130 EUR
Models
GD900 Crystal
-
K31
LM-K300Q, LMK300, LGL355DL
OS
GD900 Crystal
-
K31
Android 10, LG UX 9.1
Chipset
GD900 Crystal
-
K31
Mediatek MT6762 Helio P22 (12 nm)
CPU
GD900 Crystal
-
K31
Octa-core 2.0 GHz Cortex-A53
GPU
GD900 Crystal
-
K31
PowerVR GE8320