iPhone 4, The fastest, highest-resolution iPhone.
Features:
Facetime
See FaceTime in action
People have been dreaming about video calling for decades. iPhone 4 makes it a reality. With just a tap, you can wave hello to your kids, share a smile from across the globe, or watch your best friend laugh at your stories — iPhone 4 to iPhone 4 or to the new iPod touch over Wi-Fi. And it works right out of the box. No other phone makes staying in touch this much fun.
Two cameras, two views.
iPhone 4 has two cameras: One on the front, which focuses on you. And one on the back, which focuses on everything else. FaceTime lets you switch back and forth between them at any time during a video call. All you have to do is tap a button.
Retina Display
The Retina display on iPhone 4 is the sharpest, most vibrant, highest-resolution phone screen ever, with four times the pixel count of previous iPhone models. In fact, the pixel density is so high that the human eye is unable to distinguish individual pixels. Which makes text amazingly crisp and images stunningly sharp.
Multitasking
iPhone 4 introduces a whole new way of multitasking. Now you can run your favorite third-party apps — and switch between them instantly — without slowing down the performance of the foreground app or draining the battery unnecessarily.1 This smarter approach to multitasking is available only in iOS 4.
HD Video Recording and Editing
Shoot your own movies in high definition. Capture impressive video even in low-light settings, thanks to the advanced backside illumination sensor and built-in LED light. Then edit and create your own mini-masterpiece right on iPhone 4 using the iMovie app — with Apple-designed themes, titles, and transitions. It’s available on the App Store for $4.99.
5-Megapixel Camera with LED Flash
Take beautiful, detailed photos using the 5-megapixel camera with built-in LED flash. The advanced backside illumination sensor captures great pictures even in low light. And the front-facing camera makes it easy to take self-portraits.
iPhone 4 Technical Specifications
Size and weight1
Height: 4.5 inches (115.2 mm)
Width: 2.31 inches (58.6 mm)
Depth: 0.37 inch (9.3 mm)
Weight: 4.8 ounces (137 grams)
Capacity3
* 16GB or 32GB flash drive
Display
* Retina display
* 3.5-inch (diagonal) widescreen Multi-Touch display
* 960-by-640-pixel resolution at 326 ppi
* 800:1 contrast ratio (typical)
* 500 cd/m2 max brightness (typical)
* Fingerprint-resistant oleophobic coating on front and back
* Support for display of multiple languages and characters simultaneously
Camera, photos, and video
* Video recording, HD (720p) up to 30 frames per second with audio
* 5-megapixel still camera
* VGA-quality photos and video at up to 30 frames per second with the front camera
* Tap to focus video or still images
* LED flash
* Photo and video geotagging
Cellular and wireless
* GSM model: UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz); GSM/EDGE (850, 900, 1800, 1900 MHz)
* CDMA model: CDMA EV-DO Rev. A (800, 1900 MHz)
* 802.11b/g/n Wi-Fi (802.11n 2.4GHz only)
* Bluetooth 2.1 + EDR wireless technology
Location
* Assisted GPS
* Digital compass
* Wi-Fi
* Cellular
Price start from $199* (16GB**) $299* (32GB**)
(Source: www.apple.com)