Screen size
C331—
d520—
Quick verdict
C331 leads the measured specs 2-1.
Measured wins
C331
2
spec wins
Overall winner
Ties
3
equal specs
d520
1
spec wins
Screen size
Technology
C331
GSM
d520
GSM
2G bands
C331
GSM 900 / 1800
d520
GSM 900
GPRS
C331
Class 8
d520
No
EDGE
C331
No
d520
No
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
equal specsSD card
equal specsStereo speakers
Announced
C331
2002
d520
1998
Status
C331
Discontinued
d520
Discontinued
Dimensions
C331
101 x 48 x 21 mm (3.98 x 1.89 x 0.83 in)
d520
140 x 50 x 27 mm (5.51 x 1.97 x 1.06 in)
Weight
C331
83 g (2.93 oz)
d520
170 g (6.00 oz)
SIM
C331
Mini-SIM
d520
Mini-SIM
Type
C331
Grayscale graphic
d520
Monochrome graphic
Size
C331
d520
Resolution
C331
98 x 64 pixels, 5 lines, 3:2 ratio
d520
2 x 12 chars
Other
C331
4 shades of grey White backlight Downloadable wallpapers and screensavers
d520
Fixed icons
Card slot
C331
No
d520
No
Phonebook
C331
d520
SIM only
Call records
C331
10 dialed, 10 received, 10 missed calls
d520
Other
C331
No
d520
No
Loudspeaker
C331
No
d520
No
Alert types
C331
Vibration; Downloadable polyphonic ringtones, composer
d520
Monophonic ringtones
3.5mm jack
C331
No
d520
No
WLAN
C331
No
d520
No
Bluetooth
C331
No
d520
No
Positioning
C331
No
d520
No
Radio
C331
No
d520
No
USB
C331
d520
Sensors
C331
d520
Messaging
C331
SMS, EMS 5.0
d520
SMS
Browser
C331
WAP 1.2.1
d520
Clock
C331
Yes
d520
No
Alarm
C331
No
d520
No
Games
C331
3 - MotoGP. Snood 21, Astrosmash
d520
No
Java
C331
No
d520
No
Other
C331
Predictive text input Voice dial Calculator Currency converter Changeable housings
d520
-
Type
C331
Removable Li-Ion battery
d520
Removable NiMH 650 mAh battery
Stand-by
C331
80 h - 250 h
d520
60 h
Talk time
C331
2 h 30 min - 6 h
d520
180 min
Colors
C331
d520
3