Screen size
equal specsS812.0"
SF712.0"
Quick verdict
S81 and SF71 are close on the measured specs.
Measured wins
S81
3
spec wins
Ties
6
equal specs
SF71
3
spec wins
Screen size
equal specsTechnology
S81
GSM / UMTS
SF71
GSM / UMTS
2G bands
S81
GSM 900 / 1800 / 1900
SF71
GSM 900 / 1800 / 1900
3G bands
S81
UMTS 2100
SF71
UMTS 2100
Speed
S81
Yes, 384 kbps
SF71
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
equal specsWired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
Yes, 384 kbps
Announced
S81
2006, February
SF71
2007, March
Status
S81
Discontinued
SF71
Discontinued
Dimensions
S81
109 x 48 x 13 mm (4.29 x 1.89 x 0.51 in)
SF71
96 x 48 x 23 mm (3.78 x 1.89 x 0.91 in)
Weight
S81
99 g (3.49 oz)
SF71
118 g (4.16 oz)
SIM
S81
Mini-SIM
SF71
Mini-SIM
Type
S81
TFT, 256K colors
SF71
TFT, 256K colors
Size
S81
2.0 inches, 31 x 39 mm, 12.6 cm2 (~24.1% screen-to-body ratio)
SF71
2.0 inches, 12.4 cm2 (~26.9% screen-to-body ratio)
Resolution
S81
176 x 220 pixels (~141 ppi density)
SF71
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Other
S81
-
SF71
Second external 65K colors display, OLED (96 x 64 pixels)
Card slot
S81
microSD (dedicated slot)
SF71
microSD (dedicated slot)
Phonebook
S81
Yes, Photo call
SF71
500 x 20 fields, Photo call
Call records
S81
10 dialed, 10 received, 10 missed calls
SF71
100 dialed, 100 received, 100 missed calls
Internal
S81
30MB
SF71
45MB
Single
S81
1.3 MP
SF71
2 MP
Features
S81
LED flash
SF71
LED flash
Video
S81
Yes
SF71
Yes
Single
S81
VGA videocall camera
SF71
VGA videocall camera
Video
S81
SF71
Loudspeaker
S81
No
SF71
No
Alert types
S81
Vibration; Downloadable polyphonic, MP3, AAC ringtones
SF71
Vibration; Downloadable polyphonic, MP3 ringtones
3.5mm jack
S81
No
SF71
No
WLAN
S81
No
SF71
No
Bluetooth
S81
1.1
SF71
1.1, A2DP
Positioning
S81
No
SF71
No
Radio
S81
No
SF71
No
USB
S81
Proprietary
SF71
1.1
Sensors
S81
SF71
Messaging
S81
SMS, MMS, Email
SF71
SMS, MMS, Email
Browser
S81
WAP 2.0/xHTML
SF71
WAP 2.0/xHTML, HTML
Games
S81
Yes
SF71
5 - StarWars, SeaBattle, SuperBomber + downloadable
Java
S81
Yes, MIDP 2.0
SF71
Yes, MIDP 2.0
Other
S81
MP3/AAC player Video telephony iTap Stopwatch Organizer
SF71
Video telephony MP3/AAC/AAC+/eAAC+ player Photo editor Predictive text input Voice dial Stopwatch Organizer
Type
S81
Removable Li-Ion 920 mAh battery
SF71
Removable Li-Ion 920 mAh battery
Stand-by
S81
Up to 320 h
SF71
Up to 160 h
Talk time
S81
Up to 4 h 50 min
SF71
Up to 4 h 30 min
Colors
S81
Black/Silver
SF71
Black