From Wikipedia, the free encyclopedia
 | |
|---|---|
 An iPhone 4 displaying SpringBoard | |
| Developer | Apple Inc. |
| Manufacturer | Foxconn (OEM)[1] |
| Slogan | This changes everything. Again.[2] |
| Form factor | Slate smartphone |
| Generation | 4 |
| Release date | 24 June 2010[a] |
| Units sold | 14.1 million[3] |
| Operating system | iOS 4.2.1 (build 8C148) Released November 22, 2010 |
| Power | Built-in rechargeable Li-ion battery 3.7 V at 1420 mAh[4] |
| CPU | Apple A4 (ARM Cortex-A8)[5] |
| GPU | Apple A4 (PowerVR SGX 535)[5] |
| Storage capacity | 16 GB or 32 GB flash memory |
| Memory | 512 MB eDRAM[6] |
| Display | 3.5-inch (89 mm) diagonal 1.5:1 aspect ratio widescreen LED backlit IPS TFT LCD Retina display 960-by-640-pixel resolution at 326 ppi(0.61 Megapixels) 800:1 contrast ratio (typical) 500 cd/m2 max brightness (typical) Fingerprint-resistant oleophobic coatingon front and back glass |
| Audio | Single loudspeaker 3.5 mm TRRS Frequency response: 20 Hz to 20,000 Hz |
| Input | Multi-touch touchscreen display Push-buttons Dual microphone 3-axis gyroscope 3-axis accelerometer Digital compass Proximity sensor Ambient light sensor |
| Rear camera | 5 MP back-side illuminated sensor HD video (720p) at 30 fps 1.75 μm size pixels 5× digital zoom Tap to focus video or still images LED flash Photo and video geotagging |
| Front camera | .3 MP (VGA) SD video (480p) at 30 fps 25.17 μm size pixels Tap to focus video or still images Photo and video geotagging |
| Connectivity | Quad-band GSM/GPRS/EDGE (800 850 900 1800 1900 MHz) Quad-band UMTS/HSDPA/HSUPA (800 850 900 1900 2100 MHz) (800 MHz not yet announced as supported by Apple) Wi-Fi (802.11 b/g/n) (2.4 GHz only) Bluetooth 2.1 + EDR |
| Online services | App Store, iTunes Store, iBookstore,MobileMe |
| Dimensions | 115.2 mm (4.54 in) (h) 58.66 mm (2.309 in) (w) 9.3 mm (0.37 in) (d) |
| Weight | 137 g (4.8 oz) |
| Predecessor | iPhone 3GS |
| Related articles | iPad, iPod Touch (comparison) |
| Website | Apple – iPhone |
The iPhone 4 is a slate smartphone developed by Apple. It is the fourth generation of iPhone, and successor to the iPhone 3GS. It is particularly marketed for video calling, consumption of media such as books and periodicals, movies, music, and games, and for general web and e-mail access. It was announced on June 7, 2010, at the WWDC 2010 held at the Moscone Center, San Francisco, and was released on June 24, 2010 in the United States, the United Kingdom, France, Germany and Japan.
The iPhone 4 runs Apple's iOS operating system, the same operating system as used on previous iPhones, the iPad, and the iPod Touch. It is primarily controlled by a user's fingertips on the multi-touch display, which is sensitive to fingertip contact.
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.[8] It has an Apple A4processor 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".
Some iPhone 4 buyers have reported signal reduction when the phone is held in certain ways, especially in the left hand, as the antenna problem is in the bottom left corner of the phone's side casing. The company has offered all customers a free case until September 30, 2010, or a refund within 30 days of purchase, as cases have been shown to correct this antenna problem.[9] After this date, customers suffering these problems will still be supplied a free case (at Apple's discretion), by calling AppleCare.[10]
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