iPhone 3G Specifications:

Cellular and wireless
UMTS/HSDPA (850, 1900, 2100 MHz)
GSM/EDGE (850, 900, 1800, 1900 MHz)
Wi-Fi (802.11b/g)
Bluetooth 2.0 + EDR

GPS
Assisted GPS

In the box
iPhone 3G
Stereo Headset with mic
Dock Connector to USB Cable
USB Power Adapter
Documentation
Cleaning/polishing cloth
SIM eject tool

Audio
Frequency response: 20Hz to 20,000Hz
Audio formats supported: AAC, Protected AAC, MP3, MP3 VBR, Audible (formats
1, 2, and 3), Apple Lossless, AIFF, and WAV
User-configurable maximum volume limit
Headphones
Stereo earphones with built-in microphone
Frequency response: 20Hz to 20,000Hz
Impedance: 32 ohms
Video

Video formats supported: H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30
frames per second, Low-Complexity version of the H.264 Baseline Profile with
AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov
file formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per
second, Baseline Profile up to Level 3.0 with AAC-LC audio up to 160 Kbps,
48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 video, up
to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with
AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov
file formats

Camera and photos
2.0 megapixels
Photo geotagging
iPhone and third-party application integration

Language support
Language support for English, French, German, Japanese, Dutch, Italian,
Spanish, Portuguese, Danish, Finnish, Norwegian, Swedish, Korean, Simplified
Chinese, Traditional Chinese, Russian, and Polish.
International keyboard and dictionary support for English (U.S.), English
(UK), French (France), French (Canada), German, Japanese, Dutch, Italian,
Spanish, Portuguese (Portugal), Portuguese (Brazil), Danish, Finnish,
Norwegian, Swedish, Korean (no dictionary), Simplified Chinese, Traditional
Chinese, Russian, and Polish.