About IPhone 4
The iPhone 4 is a touchscreen smartphone developed by Apple. It is the fourth generation of iPhone, and successor to the iPhone 3GS. It is particularly marketed for video calling (marketed by Apple as FaceTime), consumption of media such as books and periodicals, movies, music, and games, and for general web and e-mail access.
The most noticeable difference between the iPhone 4 and its predecessors is the new design, which incorporates an uninsulated stainless steel frame that acts as the device's antenna. The internal components of the device are situated between two panels of chemically strengthened aluminosilicate glass.[7] It has an Apple A4 processor and 512 MB of eDRAM, twice that of its predecessor and four times that of the original iPhone. Its 3.5-inch (89 mm) LED backlit liquid crystal display with a 960×640 pixel resolution is marketed as the "Retina Display".
The latest operating system release is iOS 4.3.5 (for GSM) and 4.2.10 (for CDMA).
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)
Cellular and wireless
UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz)
GSM/EDGE (850, 900, 1800, 1900 MHz)
802.11b/g/n Wi-Fi (802.11n 2.4GHz only)
Bluetooth 2.1 + EDR wireless technology
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
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
Capacity
16GB or 32GB flash drive
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
Location
Assisted GPS
Digital compass
Wi-Fi
Cellular
Display
Retina display
3.5-inch (diagonal) widescreen Multi-Touch display
960-by-640-pixel resolution at 326 ppi
800:1 contrast ratio (typical)
Fingerprint-resistant oleophobic coating on front and back
Support for display of multiple languages and characters simultaneously
Mac system requirements
Mac computer with USB 2.0 port
Mac OS X v10.5.8 or later
iTunes 10.1 or later (free download from www.itunes.com/download)
iTunes Store account
Internet access
Windows system requirements
PC with USB 2.0 port
Windows 7; Windows Vista; or Windows XP Home or Professional with Service Pack 3 or later
iTunes 10.1 or later (free download from www.itunes.com/download)
iTunes Store account
Internet access
Environmental requirements
Operating temperature: 32° to 95° F
(0° to 35° C)
Nonoperating temperature: -4° to 113° F
(-20° to 45° C)
Relative humidity: 5% to 95% noncondensing
Maximum operating altitude: 10,000 feet (3000 m)
Sensors
Three-axis gyro
Accelerometer
Proximity sensor
Ambient light sensor
Connectors and input/output
30-pin dock connector
3.5-mm stereo headphone minijack
Built-in speaker
Microphone
Headphones
Apple Earphones with Remote and Mic
Frequency response: 20Hz to 20,000Hz
Impedance: 32 ohms
Accessories
Apple In-Ear Headphones with Remote and Mic
Engineered for extreme clarity and audio accuracy, these headphones let you hear musical details you’ve been missing.
-MobileMe Subscription
With a MobileMe subscription, your email, calendar, and contacts stay up to date on your iPhone and your computer — automatically. Lose your iPhone? MobileMe can help you find it and protect your privacy with Find My iPhone.
-Apple Earphones with Remote and Mic
These earbud headphones have convenient buttons that let you adjust volume and control music and video playback.
-Apple USB Power Adapter
Use this ultracompact USB-based adapter to charge your iPhone whenever it’s not connected to a computer.
