Screen size
CF611.8"
S81Winner: 2.0"+10%
Quick verdict
S81 leads the measured specs 6-1.
Measured wins
CF61
1
spec wins
Ties
5
equal specs
S81
6
spec wins
Overall winner
Screen size
Technology
CF61
GSM
S81
GSM / UMTS
2G bands
CF61
GSM 900 / 1800 / 1900
S81
GSM 900 / 1800 / 1900
GPRS
CF61
Class 10
S81
-
EDGE
CF61
No
S81
-
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
equal specsThickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
3G bands
CF61
-
S81
UMTS 2100
Speed
CF61
-
S81
Yes, 384 kbps
Announced
CF61
2006, March
S81
2006, February
Status
CF61
Discontinued
S81
Discontinued
Dimensions
CF61
88 x 46 x 23 mm, 80 cc (3.46 x 1.81 x 0.91 in)
S81
109 x 48 x 13 mm (4.29 x 1.89 x 0.51 in)
Weight
CF61
99 g (3.49 oz)
S81
99 g (3.49 oz)
SIM
CF61
Mini-SIM
S81
Mini-SIM
Type
CF61
TFT, 256K colors
S81
TFT, 256K colors
Size
CF61
1.8 inches, 29 x 35 mm, 10.2 cm2 (~25.2% screen-to-body ratio)
S81
2.0 inches, 31 x 39 mm, 12.6 cm2 (~24.1% screen-to-body ratio)
Resolution
CF61
128 x 160 pixels (~114 ppi density)
S81
176 x 220 pixels (~141 ppi density)
Other
CF61
Second external 4K colors display, CSTN (96 x 64 pixels) 5-way navigation key
S81
-
Card slot
CF61
microSD (dedicated slot)
S81
microSD (dedicated slot)
Phonebook
CF61
1000 x 20 fields, Photo call
S81
Yes, Photo call
Call records
CF61
10 dialed, 10 received, 10 missed calls
S81
10 dialed, 10 received, 10 missed calls
Internal
CF61
1.5MB
S81
30MB
Single
CF61
1.3 MP
S81
1.3 MP
Video
CF61
No
S81
Yes
Features
CF61
-
S81
LED flash
Other
CF61
No
S81
-
Single
CF61
-
S81
VGA videocall camera
Video
CF61
-
S81
Loudspeaker
CF61
Yes
S81
No
Alert types
CF61
Vibration; Downloadable polyphonic, MP3 ringtones
S81
Vibration; Downloadable polyphonic, MP3, AAC ringtones
3.5mm jack
CF61
No
S81
No
Other
CF61
3D surround sound
S81
-
WLAN
CF61
No
S81
No
Bluetooth
CF61
Yes
S81
1.1
Positioning
CF61
No
S81
No
Radio
CF61
No
S81
No
USB
CF61
1.1
S81
Proprietary
Sensors
CF61
S81
Messaging
CF61
SMS, EMS, MMS
S81
SMS, MMS, Email
Browser
CF61
WAP 2.0/xHTML
S81
WAP 2.0/xHTML
Games
CF61
Yes + downloadable
S81
Yes
Java
CF61
Yes, MIDP 2.0
S81
Yes, MIDP 2.0
Other
CF61
MP3/AAC/WMA player Predictive text input Organizer Exchangeable front cover Voice memo
S81
MP3/AAC player Video telephony iTap Stopwatch Organizer
Type
CF61
Removable Li-Ion 750 mAh battery
S81
Removable Li-Ion 920 mAh battery
Stand-by
CF61
Up to 225 h
S81
Up to 320 h
Talk time
CF61
Up to 3 h
S81
Up to 4 h 50 min
Colors
CF61
Silver
S81
Black/Silver