3G technology gives iPhone fast access to the Internet and email over cellular networks around the world. iPhone 3G also makes it possible to do more in more places: Surf the web, download email, get directions, and watch video — even while you’re on a call.
How it works.
iPhone 3G uses a technology protocol called HSDPA (High-Speed Downlink Packet Access) to download data fast over UMTS (Universal Mobile Telecommunications System) networks. Email attachments and web pages load twice as fast on 3G networks as on 2G EDGE networks.1 And since iPhone 3G seamlessly switches between EDGE, faster 3G, and even faster Wi-Fi, you always get the best speeds possible.
Talk and browse. At the same time.
iPhone already gives you mobile multitasking. But 3G technology lets you multitask in more places — without connecting via Wi-Fi. Since 3G networks enable simultaneous data and voice, you can talk on the phone while surfing the web, checking email, or using Maps. All from your 3G cellular network.
Go anywhere.
iPhone 3G meets worldwide standards for cellular communications, so you can make calls and surf the web from practically anywhere on the planet. And if you’re in an area without a 3G network, iPhone connects you via GSM for calls and EDGE for data.
More wireless. Less space.
iPhone 3G delivers UMTS, HSDPA, GSM, Wi-Fi, EDGE, GPS, and Bluetooth 2.0 + EDR in one compact device — using only two antennas. Clever iPhone engineering integrates those antennas into a few unexpected places: the metal ring around the camera, the audio jack, the metal screen bezel, and the iPhone circuitry itself. And intelligent iPhone power management technology gives you up to 5 hours of talk time over 3G networks.2 That’s some of the best in the business.
Product summary
The good:
The Apple iPhone 3G offers critical new features including support for high-speed 3G networks, third-party applications, and expanded e-mail. Its call quality is improved and it continues to deliver an excellent music and video experience.
The bad:
The iPhone 3G continues to lack some basic features that are available on even the simplest cell phone. Battery life was uneven, and the 3G connection tended to be shaky. Also, the e-mail syncing is not without its faults.
The bottom line:
The iPhone 3G delivers on its promises by adding critical features and sharper call quality. The iTunes App Store is pretty amazing, and the 3G support is more than welcome. Critical features still are missing, and the battery depletes quickly under heavy use, but the iPhone 3G is a big improvement over the original model.
Specifications:
OS provided: Apple MacOS X ; Band / mode: WCDMA (UMTS) / GSM 850/900/1800/1900 ; Wireless connectivity: Bluetooth 2.0 ;
Full specification :
General
Dimensions (W x D x H)
2.4 in x 0.5 in x 4.6 in
Weight
4.7 oz
Built-in devices
Camera
Color
Black
Operating System / Software
OS provided
Apple MacOS X
Software included
iTunes 7.7 or later
Memory
Flash memory installed
16 GB
Input Device
Input device type
Touch-screen
Messaging / Data Services
Voice Mail Capability
Yes
Short Messaging Service (SMS)
Yes
Internet Browser
Yes
GPRS (General Packet Radio Service)
Yes
Mobile Email
Yes
Supported Email Protocols
POP3 , IMAP4
Messaging / Data Features
PDF support , Microsoft Word support , Microsoft Excel support
Cellular
Cellular technology
WCDMA (UMTS) / GSM
Service Provider
AT&T
Band / mode
WCDMA (UMTS) / GSM 850/900/1800/1900
Phone style
Candy bar
Automatic Redial
Yes
Call Divert
Yes
Call Hold
Yes
Call Timer
Yes
Caller ID
Yes
Call Waiting
Yes
Volume Control
Yes
Antenna
Internal
Ringer Control
Yes
Wireless Interface
IEEE 802.11b , IEEE 802.11g , Bluetooth 2.0 EDR
Conference Call Capability
Yes
Computer Link
Yes
Speakerphone
Yes
Call Transfer
Yes
Polyphonic Ringer
Yes
Additional Features
aGPS
Digital Player / Recorder
Digital player supported digital audio standards
AAC , MP3 , WAV , AIFF , Apple Lossless
Display
Display type
3.5 in
Color support
32-bit (128K colors)
Max resolution
480 x 320
Power
Battery installed (max)
Lithium ion
Max supported batteries
1
Talk time
Up to 600 min
Audible Battery Alert
Yes
Expansion / Connectivity
Wireless connectivity
Source : http://reviews.cnet.com
