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This update to the original iPhone adds 3G data, GPS, and a new shape on the back side. An updated OS supports third-party software, plus corporate email, sync, and VPN features. Other features are similar, including a large multi-touch display, full web browser, Bluetooth, Wi-Fi, iPod music player, 2 megapixel camera, and up to 16 GB of internal memory.
iPhone features the most revolutionary user interface since the mouse. It’s an entirely new interface based on a large multi-touch display and innovative new software that lets you control everything using only your fingers. So you can glide through albums with Cover Flow, flip through photos and email them with a touch, or zoom in and out on a section of a web page — all by simply using iPhone’s multi-touch display.
Intelligent Keyboard iPhone’s full QWERTY soft keyboard lets you easily send and receive SMS messages in multiple sessions, and the keyboard is predictive, so it prevents and corrects mistakes, making it easier and more efficient to use than the small plastic keyboards on many smart phones.
The iPhone 3G comes certified unlocked, which means that you cause use this 3G iPhone with any GSM network worldwide.
Apple iPhone 3G Technical Specs

Band Ratings: GSM 850 / GSM 900 / GSM 1800 / GSM 1900
Weight 4.7 oz (133 g)
Dimensions 4.52” x 2.44” x 0.49” (115×62 x 12.4 mm)
Form Factor Bar
Internal Antenna
Battery Talk: 5 hours max. (300 minutes)
Standby: 300 hours max. (12.5 days)
Display Type: LCD (Color TFT/TFD)
Resolution: 320×480 pixels
3.5” diagonal
Colors: 16.7 million (24-bit)
iPhone / based on OS X corewww.cell2get.com/apple-iphone-3g-8-gb-gsm-unlocked-quadband-black-p-1222.html