detailed description(all the information is from the internet):
Nokia N90 Specifications & Features

Screen
Internal Screen 262k Colour 2.1 Inch (352 x 416 Pixels)
External Screen 65k Colour (128 x 128 Pixels)

Imaging
2 Megapixel Camera
20 x Digital Zoom
Autofocus & Flash
Flash Modes (On, Off & Auto)
Anti Red Eye
Self Timer
Two way Video Call Capability
Video & Image Editor
Video Capture (MPEG4)
Scene Settingsv Downloadable Wallpaper & Screensaver
Downloadable Themes

Messaging
SMS (Text Messaging)
MMS (Multimedia Messaging)
Automatic Resize Of MMS
Animated MMS With Sound Clip
Instant Messaging
Email
Predictive Text

Sound
RealPlayer Media
Download Multimedia Files
Stream Media Files
True Ringtones
Polyphonic Ringtones
Handsfree Speaker
Enhanced Voice Features
Speaker Independent Name Dialling (SIND)
Voice Commands
Voice Recorder

Entertainment
Java? Games
Downloadable Java? Games

Organiser
Contacts
Calendar
Alarm Clock
Calculator
Timer
Call Management
Push to Talk (PoC)
Speed Dialling
Automatic Redial
Conference Call
XpressPrint Printing Solution

Connectivity
3G
Bluetooth?
USB Via Pop-Port? Interface

Network
Tri Band (GSM 900, GSM 1800 & GSM 1900)
WCDMA 2100
EGPRS

Internet
WAP 2.0
XHTML
HTML

Memory & Talk Time
27 Mbytes Memory
Plus 64Mbytes MultiMediaCard (MMC)
3 Hours Talk Time
288 Hours Standby

Weight & Size
173 g
112 x 51 x 24 mm