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iPhone 4 review and Specification

"iPhone 4 is the biggest leap since the original iPhone," said Steve Jobs, Apple's CEO. "FaceTime video calling sets a new standard for mobile communication, and our new Retina display is the highest resolution display ever in a phone, with text looking like it does on a fine printed page. We have been dreaming about both of these breakthroughs for decades."

The much-anticipated feature FaceTime allows video conferencing from iPhone to iPhone over a wi-fi network.

The iPhone 4 features a 5-megapixel camera with LED flash, HD video recording, a faster processor, a 3-axis gyro, and up to 40 percent longer talk time, Apple claims.

The unit itself is redesigned inside and out -- the case is made of glass and stainless steel, which acts as an antenna.

The 3.5-inch display features a resolution of 960 by 640 pixels -- that's four times as many pixels as the iPhone 3GS. Many reviews say the display is incredibly bright and sharp.

The iPhone 4 comes in black or white, although Apple says that the white model won't be available until late July because of challenges in manufacture.
       iphone 4 Specification
  
          Size and weight
  • 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) 

       Capacity

  • 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

     

    TV and video

  • Video formats supported: H.264 video up to 720p, 30 frames per second, Main Profile level 3.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format
  • Support for 1024 by 768 pixels with Dock Connector to VGA Adapter; 576p and 480p with Apple Component AV Cable; 576i and 480i with Apple Composite AV Cable (cables sold separately)       

       

        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

         Sensors
  • Three-axis gyro
  • Accelerometer
  • Proximity sensor
  • Ambient light sensor

          Headphones
  • Apple Earphones with Remote and Mic
  • Frequency response: 20Hz to 20,000Hz
  • Impedance: 32 ohms

         Power and battery
  • Built-in rechargeable lithium-ion battery
  • Charging via USB to computer system or power adapter

  • Talk time:
    Up to 7 hours on 3G
    Up to 14 hours on 2G (GSM model only)



  • Standby time: Up to 300 hours




  • 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













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