Screen size
C811.8"
S81Winner: 2.0"+10%
Quick verdict
S81 leads the measured specs 5-3.
Measured wins
C81
3
spec wins
Ties
4
equal specs
S81
5
spec wins
Overall winner
Screen size
Technology
C81
GSM
S81
GSM / UMTS
2G bands
C81
GSM 900 / 1800 / 1900
S81
GSM 900 / 1800 / 1900
GPRS
C81
Class 10
S81
-
EDGE
C81
Class 10
S81
-
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront 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
3G bands
C81
-
S81
UMTS 2100
Speed
C81
-
S81
Yes, 384 kbps
Announced
C81
2006, March
S81
2006, February
Status
C81
Discontinued
S81
Discontinued
Dimensions
C81
104 x 46.5 x 17.7 mm (4.09 x 1.83 x 0.70 in)
S81
109 x 48 x 13 mm (4.29 x 1.89 x 0.51 in)
Weight
C81
90 g (3.17 oz)
S81
99 g (3.49 oz)
SIM
C81
Mini-SIM
S81
Mini-SIM
Type
C81
TFT, 256K colors
S81
TFT, 256K colors
Size
C81
1.8 inches, 27 x 36 mm, 10.0 cm2 (~20.7% screen-to-body ratio)
S81
2.0 inches, 31 x 39 mm, 12.6 cm2 (~24.1% screen-to-body ratio)
Resolution
C81
132 x 176 pixels, 4:3 ratio (~122 ppi density)
S81
176 x 220 pixels (~141 ppi density)
Card slot
C81
RS-MMC
S81
microSD (dedicated slot)
Phonebook
C81
Yes, Photo call
S81
Yes, Photo call
Call records
C81
10 dialed, 10 received, 10 missed calls
S81
10 dialed, 10 received, 10 missed calls
Internal
C81
23MB
S81
30MB
Single
C81
1.3 MP
S81
1.3 MP
Video
C81
Yes
S81
Yes
Features
C81
-
S81
LED flash
Other
C81
No
S81
-
Single
C81
-
S81
VGA videocall camera
Video
C81
-
S81
Loudspeaker
C81
No
S81
No
Alert types
C81
Vibration; Downloadable polyphonic, MP3, AAC ringtones
S81
Vibration; Downloadable polyphonic, MP3, AAC ringtones
3.5mm jack
C81
No
S81
No
WLAN
C81
No
S81
No
Bluetooth
C81
1.2, A2DP
S81
1.1
Positioning
C81
No
S81
No
Radio
C81
No
S81
No
USB
C81
2.0
S81
Proprietary
Sensors
C81
S81
Messaging
C81
SMS, MMS, EMail, Instant Messaging
S81
SMS, MMS, Email
Browser
C81
WAP 2.0/xHTML
S81
WAP 2.0/xHTML
Games
C81
Yes + downloadable
S81
Yes
Java
C81
Yes, MIDP 2.0
S81
Yes, MIDP 2.0
Other
C81
MP3/AAC player Predictive text input Organizer Voice memo
S81
MP3/AAC player Video telephony iTap Stopwatch Organizer
Type
C81
Removable Li-Ion 820 mAh battery
S81
Removable Li-Ion 920 mAh battery
Stand-by
C81
Up to 300 h
S81
Up to 320 h
Talk time
C81
Up to 5 h
S81
Up to 4 h 50 min
Colors
C81
Piano Black
S81
Black/Silver