Screen size
equal specsEF912.0"
S812.0"
Quick verdict
EF91 leads the measured specs 5-2.
Measured wins
EF91
5
spec wins
Overall winner
Ties
4
equal specs
S81
2
spec wins
Screen size
equal specsTechnology
EF91
GSM / HSPA
S81
GSM / UMTS
2G bands
EF91
GSM 900 / 1800 / 1900
S81
GSM 900 / 1800 / 1900
3G bands
EF91
HSDPA 2100
S81
UMTS 2100
Speed
EF91
HSPA
S81
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
EF91
2006, February
S81
2006, February
Status
EF91
Discontinued
S81
Discontinued
Dimensions
EF91
92 x 46.5 x 23.5 mm, 86 cc (3.62 x 1.83 x 0.93 in)
S81
109 x 48 x 13 mm (4.29 x 1.89 x 0.51 in)
Weight
EF91
100 g (3.53 oz)
S81
99 g (3.49 oz)
SIM
EF91
Mini-SIM
S81
Mini-SIM
Type
EF91
TFT, 256K colors
S81
TFT, 256K colors
Size
EF91
2.0 inches, 30 x 40 mm, 12.4 cm2 (~29.0% screen-to-body ratio)
S81
2.0 inches, 31 x 39 mm, 12.6 cm2 (~24.1% screen-to-body ratio)
Resolution
EF91
240 x 320 pixels, 4:3 ratio (~200 ppi density)
S81
176 x 220 pixels (~141 ppi density)
Other
EF91
Second external 65K colors display, OLED(96 x 64 pixels)
S81
-
Card slot
EF91
microSD (dedicated slot)
S81
microSD (dedicated slot)
Phonebook
EF91
Yes, Photo call
S81
Yes, Photo call
Call records
EF91
10 dialed, 10 received, 10 missed calls
S81
10 dialed, 10 received, 10 missed calls
Internal
EF91
32MB
S81
30MB
Single
EF91
3.15 MP, AF
S81
1.3 MP
Features
EF91
LED flash
S81
LED flash
Video
EF91
Yes
S81
Yes
Single
EF91
VGA videocall camera
S81
VGA videocall camera
Video
EF91
S81
Loudspeaker
EF91
Yes
S81
No
Alert types
EF91
Vibration; Downloadable polyphonic, MP3 ringtones
S81
Vibration; Downloadable polyphonic, MP3, AAC ringtones
3.5mm jack
EF91
No
S81
No
Other
EF91
3D sound
S81
-
WLAN
EF91
No
S81
No
Bluetooth
EF91
1.2, A2DP
S81
1.1
Positioning
EF91
No
S81
No
Radio
EF91
No
S81
No
USB
EF91
Proprietary
S81
Proprietary
Sensors
EF91
S81
Messaging
EF91
SMS, MMS, Email
S81
SMS, MMS, Email
Browser
EF91
WAP 2.0/xHTML
S81
WAP 2.0/xHTML
Games
EF91
Yes + downloadable
S81
Yes
Java
EF91
Yes, MIDP 2.0
S81
Yes, MIDP 2.0
Other
EF91
Video telephony MP3/AAC player Predictive text input Voice memo Stopwatch Organizer
S81
MP3/AAC player Video telephony iTap Stopwatch Organizer
Type
EF91
Removable Li-Ion 1000 mAh battery
S81
Removable Li-Ion 920 mAh battery
Stand-by
EF91
-
S81
Up to 320 h
Talk time
EF91
-
S81
Up to 4 h 50 min
Colors
EF91
Arctic Silver
S81
Black/Silver