The iPhone 4 sports a new look and is the thinnest smartphone, he said. At 9.3 millimeters (0.36 inches) thick, the new iPhone is 24 percent thinner than iPhone 3GS, Jobs said.
It has a 3.5-inch display that will show images at a 960-pixel-by-480-pixel resolution. The phone includes a sharper display that will show four times as many pixels in the same amount of space as earlier iPhones.
The new smartphone also has about 100 new features, including a front-facing video camera and a new camera system. The phone will support UMTS (Universal Mobile Telecommunication System) and GSM (Global System for Mobile Communications) 3G networks, and has Bluetooth, Wi-Fi and GPS capabilities. It has a Micro-SIM tray on the side.
The phone has improved battery life over its predecessors, including seven hours of talk time and six hours of Web browsing time through 3G networks. It also offers 10 hours of browsing through Wi-Fi networks, 10 hours of video and 40 hours of music.
The phone will include an Apple-developed A4 chip, which includes an Arm-based processor, which should help it run faster. It also has improved graphics capabilities. The new iPhone will be able to record 720p video at 30 frames per second, Jobs said.
Macworld is blogging live from the keynote.
(More to follow.)