The iPhone is a range of smart-phones designed,developed and marketed by Apple Inc.An iphone is equipped with many advanced functions and features like internet access,multimedia,multi-touch screen,GPS navigation,video camera,Bluetooth,Wi-Fi and 3G connectivity.It may also be regarded a mobile phone which has combined features and functionalities of an iPad,a tablet PC,a digital camera and a cell phone in one single device.An iPhone is equipped with so many advanced functions and features that it would not be wrong to say that it is much more sophisticated and advanced machine than a Personal Computer (PC).
According to wikipedia,the first iphone by Apple Inc. was unveiled on January 9,2007,while it was released on June 29,2007.Until now,four generations of iphone models have been released to the market by Apple Inc.Each of these four generations of iphone models was shipped with a new version of iOS.The iOs is Apple's mobile phone operating system that was formerly known as iphone OS.
According to wikipedia,the four generations of iPhone models are :
- iPhone (original) - released on June 29,2007
- iPhone 3G - released on July 11, 2008
- iPhone 3GS - released on June 19, 2009
- iPhone 4 - released on June 24, 2010
Since,among the above mentioned four generations of iPhone models,iphone 4 is the latest generation of iphone models,therefore focus of this article would be mainly on iPhone 4.The user interface of iPhone is based on its multi-touch screen,which also features a virtual keypad in place of a physical keypad.Unlike other comparable smart-phones,which utilize physical keypad and stylus for user input,the iPhone rather utilizes multi-touch screen and virtual keypad for user input.
iPhone is extremely thin but it is wider and longer than many other smart-phones equipped with similar functions and features.According to technical specifications given at official website of Apple Inc. iPhone 4 has following physical dimensions:
- 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)
According to the official website of Apple Inc., the iPhone 4 is the world's thinnest smart-phone.
iPhone 4 is equipped with retina display feature,which means that its display features four times the pixel density of a typical LCD display.To achieve retina display feature in iphone4 display,the pixels are designed to be so small (78 micrometers across) that a human eye cannot distinguish individual pixels.This makes text remarkably sharp and graphics extraordinarily vivid.It has 3.5-inch (diagonal) wide-screen multi-touch screen LCD display,which has resolution of 960x640 pixels at 326 ppi (pixels per inch).The image resolution offered by LCD display of iPhone is claimed to be far denser than anything else in consumer electronics that is currently available in market.Its LCD display typically features maximum brightness of 500 cd/m2.Its LCD display is scratch-resistant and fingerprint-resistant.Due to the In-Plane Switching (IPS) technology used in LCD display of iPhone 4,it provides superb colour and contrast from a wide range of viewing angles.
iPhone 4 is equipped with four sensors i.e., three-axis gyro for motion sensing,accelerometer for sensing the orientation of the phone so that the phone may switch the screen between portrait mode and landscape mode depending upon its orientation,proximity sensor for deactivating the display and touch-screen when the mobile phone is brought near the face while making or attending a phone call, and an ambient light sensor to adjust the display brightness to save the battery power.
The iPhone 4 is equipped with A4 processor designed by Apple engineers.This chip has remarkable processing power.Despite its computational and processing capabilities it is highly energy efficient.It has remarkable capability to perform computationally complex jobs like multi-tasking,placing FaceTime calls and video editing.
iphone 4 is equipped with remarkably high quality camera of 5 mega-pixel resolution.Which is not only capable of shooting high resolution still images but also it can shoot High Definition (HD) video.iPhone 4 is equipped with advanced backside illumination due to which it is capable of capturing excellent images even in low-light settings.The built-in LED flash light of iphone 4 has a dual purpose,which serves a flash while taking still pictures,while it stays continuously on while shooting videos to light up the scene.The built-in camera in front of iPhone 4 is excellent for making FaceTime calls,i.e. video calls.It is also perfect for shooting self-portraits.iphone 4 is equipped with two built-in cameras one on the front side and one on the back side.
Unlike most of the mobile phones,the iPhone 4 has two microphones.The main microphone is located near the dock connector at the bottom of the phone.The main mic is for phone calls, which can also be used for voice commands and memos.The second mic is located at the top of the phone near the headphone jack.This mic is for FaceTime calls and works with main mic for improving the voice quality by suppressing unwanted and distracting background sound to make your phone calls better.
All the state-of-art technology utilized in iPhone 4 is enclosed between two panels of aluminium silicate glass.According to the official website of Apple Inc., the glossy glass utilized in iPhone 4 is of same type as is used in high-speed trains and wind-shields of helicopters.This glass is chemically processed to be 20 times stiffer and 30 times harder than plastic.
The iphone 4 is shipped with built-in rechargeable Li-ion battery.The battery may be charged both by means of power adapter as well as by USB cable connected with PC.
The iPhone 4 has a remarkable data storage capacity,it is shipped either with 16GB or with 32 GB of flash drive.It also features a digital compass.
iPhone 4 is equipped with a very useful feature of GPS navigation,it may pinpoint your location accurately and quickly on the map using a combination of GPS,Wi-Fi and cellular towers.In addition to this it may update your location automatically on the digital map when you move.
The iPhone 4 is equipped with so many advanced functions,features and sophisticated technology that it is simply masterpiece of state-of-the-art technology.
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