Screen size
equal specsS812.0"
SL912.0"
Quick verdict
SL91 leads the measured specs 5-3.
Measured wins
S81
3
spec wins
Ties
4
equal specs
SL91
5
spec wins
Overall winner
Screen size
equal specsTechnology
S81
GSM / UMTS
SL91
GSM / UMTS
2G bands
S81
GSM 900 / 1800 / 1900
SL91
GSM 900 / 1800 / 1900
3G bands
S81
UMTS 2100
SL91
UMTS 2100
Speed
S81
Yes, 384 kbps
SL91
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
Yes, 384 kbps
Announced
S81
2006, February
SL91
2006, July
Status
S81
Discontinued
SL91
Discontinued
Dimensions
S81
109 x 48 x 13 mm (4.29 x 1.89 x 0.51 in)
SL91
89 x 47 x 23 mm (3.50 x 1.85 x 0.91 in)
Weight
S81
99 g (3.49 oz)
SL91
109 g (3.84 oz)
SIM
S81
Mini-SIM
SL91
Mini-SIM
Type
S81
TFT, 256K colors
SL91
TFT, 16M colors
Size
S81
2.0 inches, 31 x 39 mm, 12.6 cm2 (~24.1% screen-to-body ratio)
SL91
2.0 inches, 12.4 cm2 (~29.6% screen-to-body ratio)
Resolution
S81
176 x 220 pixels (~141 ppi density)
SL91
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Other
S81
-
SL91
Touch-sensitive navigation keys
Card slot
S81
microSD (dedicated slot)
SL91
microSD (dedicated slot)
Phonebook
S81
Yes, Photo call
SL91
Yes, Photo call
Call records
S81
10 dialed, 10 received, 10 missed calls
SL91
10 dialed, 10 received, 10 missed calls
Internal
S81
30MB
SL91
64MB
Single
S81
1.3 MP
SL91
3.15 MP, AF
Features
S81
LED flash
SL91
-
Video
S81
Yes
SL91
Yes
Single
S81
VGA videocall camera
SL91
VGA videocall camera
Video
S81
SL91
Loudspeaker
S81
No
SL91
No
Alert types
S81
Vibration; Downloadable polyphonic, MP3, AAC ringtones
SL91
Vibration; Downloadable polyphonic, MP3 ringtones
3.5mm jack
S81
No
SL91
No
WLAN
S81
No
SL91
No
Bluetooth
S81
1.1
SL91
Yes
Positioning
S81
No
SL91
No
Radio
S81
No
SL91
Stereo FM radio, RDS
USB
S81
Proprietary
SL91
2.0
Sensors
S81
SL91
Messaging
S81
SMS, MMS, Email
SL91
SMS, MMS, Email
Browser
S81
WAP 2.0/xHTML
SL91
WAP 2.0/xHTML
Games
S81
Yes
SL91
Yes + downloadable
Java
S81
Yes, MIDP 2.0
SL91
Yes, MIDP 2.0
Other
S81
MP3/AAC player Video telephony iTap Stopwatch Organizer
SL91
MP3/AAC/eAAC+/XMF player Predictive text input Reminder Organizer
Type
S81
Removable Li-Ion 920 mAh battery
SL91
Removable Li-Ion 950 mAh battery
Stand-by
S81
Up to 320 h
SL91
Up to 310 h
Talk time
S81
Up to 4 h 50 min
SL91
Up to 3 h 15 min
Colors
S81
Black/Silver
SL91
Magic Black