Some Awesome new feature
Retina Display: The 960-by-640 backlit LCD display with a pixel density of 326 pixels per inch, making it the highest-resolution phone screen ever. To achieve this, Apple engineers developed pixels that the human eye can’t distinguish individual pixels. That makes text remarkably sharp and graphics incredibly vivid. IPS technology also provides excellent color and contrast from almost any viewing angle.
Stainless Steel: Five times stronger than standard steel, the CNC-machined band is the mounting point for all the components of iPhone 4. The band provides impressive structural rigidity and allows for its incredibly thin, refined design.
New Apple’s A4 Processor: Apple engineers designed the A4 chip to be a remarkably powerful with power-efficient mobile processor. Thats why iPhone 4 can easily perform complex jobs such as multitasking, editing video, and placing FaceTime calls and also maximize the battery life
GYRO+Accelometr: iPhone 4 has a built-in three-axis gyroscope paired with the accelerometer, it makes iPhone 4 capable of advanced motion sensing such as user acceleration, full 3D attitude, and rotation rate for greater gaming expereince.
Enhanced camera with LED: The iPhone 4 camera shoots gorgeous 5-megapixel photos and stunning HD video. And with its advanced backside illumination sensor, it captures beautiful images even in low-light settings. When you’re taking pictures, LED works as a flash. When you’re shooting video it can stay on to light up the scene.
Size: 115.2 mm x 58.6 mm x 9.3 mm
Weight: 4.8 ounces (137 grams)
Display: 3.5-inch Multi-Touch display, Ambient light sensor,
Capacity: 16GB or 32GB flash drive
Frequency and connectivity: AGPS, Compass, Wi-Fi, 3.5mm headhone jack, USB 2.0, iTunes, Windows XP sp3 or later.
Camera & Video:
Video recording HD (720p) 30fps, 5-megapixel camera, VGA front camera, Tap to focus video or still images, LED flash, Photo and video geotagging.
Video formats supported: H.264 video up to 720p, m4v, mp4, mov ,mpeg-4 ,Motion JPEG (M-JPEG), PCM , .avi file formats.
Audio formats supported: AAC, Protected AAC, HE-AAC, MP3, MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV.
Talk time: Up to 7 hours on 3G, Up to 14 hours on 2G
Standby time: Up to 300 hour
Internet use: Up to 6 hours on 3G, Up to 10 hours on Wi-Fi
Video playback: Up to 10 hours
Audio playback: Up to 40 hours