iPhone one of the most popular smartphone which is designed and marketed by Apple Inc. iphone runs Apple's iOS mobile operating system. The first iPhone was released on June 29, 2007; the most recent iPhone models launched are the iPhone 6 and iPhone 6 Plus, which were launched at a special event on September 9, 2014.
The user interface of iphone is built around the device's amolded multi-touch screen, including a virtual keyboard. The iPhone has Wi-Fi and can connect to many cellular networks,it also works as a portable wifi hotspot.
There are eight generations of iPhone models launched till now each accompanied by one of the eight major releases of iOS. The original 1st-generation iPhone was a GSM phone.
Sales and profits of i phone
Apple sold more than 6.1 million first generation iPhone units over five quarters.i phone Sales in the fourth quarter of 2008 decreased due to BlackBerry sales of 5.2 million units. Due to this Apple became third largest mobile phone manufacturer by revenue, after Nokia and Samsung.
Production of i phone
Foxconn a Taiwan based company was manufacturer of i phone upto iphone 4.
After Tom cook becamce CEO of company , Apple changed its strategy and ousourced another company Pegatron which is also base in Taiwan. Now both Foxconn and Pegatron manufacturing i phone. i phone 4s was first model manufactured by both companies simultaneously.
Hardware
Screen and input
The touchscreen on the first five generations of i phone is a 9 cm (3.5 in) liquid crystal display with scratch-resistant glas. On iphone 5 screen size was 4 inches. The capacitive touchscreen is designed for a bare finger, or multiple fingers for multi-touch sensing.
The touch and gesture features of the iPhone are based on technology originally developed by FingerWorks.
The iPhone has a minimal hardware user interface, featuring five buttons. The only physical menu button is situated directly below the display, and is called the "Home button"
Sensors
Sensors in i phone was three sensors since i phone 4
Moving the iPhone around triggers two other sensors (three since the iPhone 4), which are used to enable motion-controlled gaming applications and location-based services.
Ambient light sensor
An ambient light sensor adjusts the display brightness which in turn saves battery power.
Radio
The iPhone has a built-in am/fm radio, which is disabled by default
Battery
Replacing the battery requires disassembling the iPhone unit and exposing the internal hardware
The iPhone features an internal rechargeable lithium-ion battery. Like an iPod, but unlike most other mobile phones at the time of its launch, the battery is not user-replaceable
Camera
The 1st-generation iPhone and iPhone 3G have a fixed-focus 2.0-megapixel camera on the back for digital photos
The iPhone 3GS has good configuration than 1st generation, it has a 3.2-megapixel camera with autofocus, auto white balance, and auto macro .
The iPhone 4 introduced with some more advanced features a 5.0-megapixel camera (2592×1936 pixels) that can record video at 720p resolution, considered high-definition.
The iPhone 4S' camera can shoot 8-MP stills and 1080p video which is one of the advaced features in i phone, can be accessed directly from the lock screen, and can be triggered using the volume-up button as a shutter trigger.
The iPhone 5 and iPhone 4S, running iOS 6 or later, can take panoramas using the built-in camera app
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