Apple iPhone Part 02
iPhone 3G, 3GS
Apple released the second generation iPhone and iPhone OS 2.0 on July 11, 2008. The new device was called iPhone 3G, referring to its new ability to connect to third-generation (3G) cellular networks powered by technologies such as UMTS (Global Service for Mobile Communications). And HSDPA (High Speed Downlink Packet Access). It was available in 8 GB and 16 GB models.
IPhone OS 2.0 update included a number of features designed for business, including email support for Microsoft Exchange. Enhanced mobile security features included secure access to corporate networks via Cisco's IPSec Virtual Private Network (VPN), as well as remote wiping and other management capabilities.
Apple has also released a software development kit (SDK) for dedicated apps, a central administration tool configuration tool, and most importantly, the App Store - a portal through which iPhone users can purchase and download additional apps to run on the device.
The iPhone 3G replaced the flat aluminum shell of the first generation iPhone with a sleek black or white convex plastic body. Switching to plastic allowed better transport of many radio receivers inside the device.
IPhone 3G also features A-GPS, which combines triangulation with the use of cell towers and a GPS receiver. It did not support Flash, Java, or MMS (Multimedia Messaging Service). The built-in Bluetooth supports wireless earbuds but not the stereo, laptop computer, or FTP (File Transfer Protocol) connection.
Less than a year after the iPhone 3G debuted, on June 19, 2009, Apple released the iPhone 3GS and iPhone OS 3.0. The IPhone 3GS is available in 16 and 32 GB models and features several hardware improvements, including a video camera, an integrated compass, and faster download speeds with support for HSDPA 7.2 Mbps.
The new version of the OS brought support for MMS, copy and paste functionality and the Find My Phone app. Additionally, the extended SDK enabled developers to create in-app purchases, push notifications and third-party app navigation capabilities.
IPhone 4 and 4S
Apple released the iPhone 4 on June 21, 2010. With this model, Apple also changed the name of the operating system from iPhone OS to iOS. The name changed following the launch of the iPad on April 3, 2010, which was running the same operating system.
Hardware innovations in the iPhone 4 included Apple's Retina display, which boasted a higher pixel density than previous iPhone screens and its front camera. For the first time, Apple also produced versions with CDMA (Code Division Multiple Access) connectivity, which allowed the device to communicate with a variety of cellular carrier networks.
IOS 4 introduced FaceTime, an app that enabled users to make video calls to each other over Wi-Fi. It also brought limited multitasking capabilities to the iPhone, allowing users to make phone calls or listen to music in one app, while opening a different app on the screen.
On October 11, 2011, Apple released the iPhone 4S, which debuted for Siri, a voice-activated digital assistant app. The device runs on the new Apple A5 processors and ships with iOS 5, which debuted Apple's cloud service, iCloud, and its texting and multimedia technology, iMessage.
IPhone 5, 5C, and 5S
The Apple iPhone 5, released on September 21, 2012, featured a screen taller than its predecessors, measuring 4 inches diagonally with an aspect ratio of 16: 9 and a widescreen display with a resolution of 1136 x 640. It was run on Apple's A6 processor and included a nano-card. Specially designed SIM, as well as a new connector that was not compatible with sockets and accessories for the previous iPad, iPod, or iPhone devices. IPhone 5 was also the first iPhone to support LTE (LTE) and 5GHz wireless band. It was available in 16GB, 32GB and 64GB models.
IPhone 5 ships with iOS 6, whose new features included the original Maps app and Passbook, an app that stores digital credit cards, boarding passes, and more.
IPhone 5S, released on September 20, 2013, shipped with iOS 7 and was powered by a 64-bit dual-core A7 processor. Apple added another new chip called the M7 coprocessor, which processed motion data from the phone's gyroscope, compass, and accelerometer.
The iPhone 5 and 5S had the same aluminum frame, bevelled edges, weight and dimensions, weighing just 3.9 ounces and measuring 4.9 x 2.3 x 0.3 inches.
The iPhone 5S had an updated F2.2 camera lens. Other new camera features included slow-motion video and live video zoom capabilities.
Perhaps the biggest change to the iPhone 5S was Touch ID, which converted the phone's home button into a fingerprint scanner used to authenticate access to the device and iTunes.
The iPhone 5C, released on the same day as the 5S, came in five different colors: white, pink, yellow, blue and green. It was the same size as the iPhone 5S at 4.9 x 2.3 x 0.3 inches, and weighed about 4.6 ounces. Iphone
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