The iPhone has come from the Apple Inc. Steve Jobs unveiled the first iPhone on 9th January 2007; and it was released on 29th June 2007. The latest version of the iPhone family is the iPhone 4S which was released on 14th October 2011. An iPhone has many lucrative features, such as camera phone, video camera, portable media player, web browsing and email capabilities, 3G and Wi-Fi connectivity. It can send texts; it can also receive visual voicemail. Its user interface is on its multi-touch screen. There is also a virtual keyboard in this fifth generation smart-phone.
Though some people are waiting for a true fifth generation smart-phone iPhone 5, here the version iPhone 4S (the fifth generation of the iPhone family) has been discussed. For this phone different applications are available at the App Stores. The store was launched in the middle of 2008, and now there are around half a million apps which are approved by Apple. There are miscellaneous functions, such as games, GPS navigation, reference, social networking, advertising for different celebrities and television shows. Each generation is accompanied by an iOS which is also known as iPhone OS. 3G cellular network and A-GPS location were added in the 3G version. Faster processor, high resolution camera, and a compass were added in the 3GS version.
There are two cameras in the iPhone 4 version, one is front facing and one is rear facing. The front one has lower resolution. The front facing camera can be used with applications like Skype. Higher resolution display is added in the iPhone 4 version. This was released on 24th June 2010. At the beginning AT&T was the only carrier in the USA. Afterward, on 10th February 2011, an iPhone 4 CDMA version was released for Verizon.
An 8 megapixel camera is added in the iPhone 4S version. It has the capacity of 1080p video recording, video stabilization, and face detection. It is also featured with faster processor, GLONASS support, multi-standard wireless support which allows a handset to operate on both CDMA and GSM / UMTS. There is also a voice control system named ‘Siri’ in the 4S version of the iPhone. Screen resolution of the 4S version is 640 X 960. The touch screen can be operated by a bare finger. For audio input and output, there are speakers and microphone. The volume control of each iPhone model is on the left side.
There is a lithium-ion battery to power up the phone. However, the battery is not replaceable by the user. It can be recharged directly from the AC outlet by a wall charger or an adapter. If there is any type of malfunctions the company will replace it at free of cost while it is under warranty. Usually the warranty period is one year. The iPhone 4S models are available in different storage sizes; sixteen gigabytes, thirty two gigabytes, and sixty four gigabytes. It does not support any memory card slot. It stores data on the flash drive.