Screen size
iO—
Twin—
Quick verdict
iO leads the measured specs 2-1.
Measured wins
iO
2
spec wins
Overall winner
Ties
3
equal specs
Twin
1
spec wins
Screen size
Technology
iO
GSM
Twin
GSM
2G bands
iO
GSM 900
Twin
GSM 900 / 1800
GPRS
iO
No
Twin
No
EDGE
iO
No
Twin
No
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
Announced
iO
1999
Twin
2000
Status
iO
Discontinued
Twin
Discontinued
Dimensions
iO
122 x 56 x 24 mm (4.80 x 2.20 x 0.94 in)
Twin
112 x 49 x 27 mm, 115 cc (4.41 x 1.93 x 1.06 in)
Weight
iO
167 g (5.89 oz)
Twin
105 g (3.70 oz)
SIM
iO
Mini-SIM
Twin
Mini-SIM
Type
iO
Monochrome graphic
Twin
Monochrome graphic
Size
iO
Twin
Resolution
iO
6 lines
Twin
100 x 48 pixels, 6 lines
Other
iO
Dynamic & user-selectable font size Cyrillic characters
Twin
Electro-luminescent lighting Dynamic & user-selectable font size
Card slot
iO
No
Twin
No
Phonebook
iO
SIM only
Twin
255
Call records
iO
15 dialed, 5 received, 5 missed calls
Twin
15 dialed, 5 received, 5 missed calls
Other
iO
No
Twin
No
Loudspeaker
iO
No
Twin
No
Alert types
iO
Vibration; Monophonic ringtones
Twin
Downloadable monophonic ringtones
3.5mm jack
iO
No
Twin
No
Other
iO
-
Twin
Personalised ringing melodies Ascending alert Several SMS alert tones and tone levels
WLAN
iO
No
Twin
No
Bluetooth
iO
No
Twin
No
Positioning
iO
No
Twin
No
Radio
iO
No
Twin
No
USB
iO
Twin
Sensors
iO
Twin
Messaging
iO
SMS
Twin
SMS
Browser
iO
Twin
Clock
iO
Yes
Twin
Yes
Alarm
iO
Yes
Twin
Yes
Games
iO
3
Twin
3 - Wall breaker, Galactic gunner, Labyrinth
Java
iO
No
Twin
No
Other
iO
Predictive text input Organizer Phone ON/OFF timers Temperature indicator
Twin
Predictive text input Organizer Phone ON/OFF timers User-changeable display masks
Type
iO
Removable NiMH 700 mAh battery
Twin
Removable Li-Ion 650 mAh battery
Stand-by
iO
60 h
Twin
120 h
Talk time
iO
5 h
Twin
5 h 20 min
Colors
iO
6
Twin
3