The iPhone is a line of internet and multimedia-enabled smartphones designed and marketed by Apple. The first iPhone was unveiled by Steve jobs, CEO of Apple, at the mascone centre in San Francisco, California on January 9, 2007. The phone was released on June 29,2007.
An iPhone can function as a Video camera, a camera phone, with Text messaging and visual voice mails, a portable media player, and an internet client with e-mail and web browsing capabilities and both Wi-Fi and 3G connectivity. The user interface is built around the device's multi-touch screen, including a visual keyboard rather than a physical one.
iPhone 3G:
iPhone 3G:
The iPhone 3G is the second generation of iPhone. It was the successor to the original iPhone, and is succeeded by the iPhone 3GS. Introduced on june 9, 2008, at the WWDC 2008 in Moscone centre, San Francisco. The 3G was similar to its predecessor, containing the same 2mp camera and no video recording. And its performance was limited by the same 128MB eDRAM memory unit nevertheless, the 3G featured several improvement over the original. It supported Assisted GPS, 3G data and TRI-BAND UMTS/HSDPA.
The iPhone 3G runs Apple's iOS operating system, the same operating system used on previous iPhones, iPads, the Apple's TV and the iPod touch. It is primarily controlled by a user's fingertips on the multi-touch display, which is sensitive to fingertip contact.
For more information: Apple iPhone 3G
iPhone 3GS:-
The iPhone 3GS is the third generation of iPhone designed and marketed by Apple Inc. It was introduced on June 8, 2009 at the WWDC 2009 which took place at the Moscone Center, San Francisco.
Its features primarily consist of faster performance, a camera with higher resolution and video capability, voice control,[7] and support for 7.2 Mbit/s HSDPA downloading (but remains limited to 384 kbps uploading as Apple had not implemented the HSUPA protocol).[8] It was released in the U.S., Canada and six European countries on June 19, 2009,[2] in Australia and Japan on June 26, and internationally in July and August 2009.
The iPhone 3GS runs Apple's iOS operating system, as is used on the iPad and the iPod touch. It is primarily controlled by a user's fingertips on a multi-touch display.
The iPhone 3GS is preceded by the iPhone 3G and succeeded by the iPhone 4.
iPhone 3GS:-
The iPhone 3GS is the third generation of iPhone designed and marketed by Apple Inc. It was introduced on June 8, 2009 at the WWDC 2009 which took place at the Moscone Center, San Francisco.
Its features primarily consist of faster performance, a camera with higher resolution and video capability, voice control,[7] and support for 7.2 Mbit/s HSDPA downloading (but remains limited to 384 kbps uploading as Apple had not implemented the HSUPA protocol).[8] It was released in the U.S., Canada and six European countries on June 19, 2009,[2] in Australia and Japan on June 26, and internationally in July and August 2009.
The iPhone 3GS runs Apple's iOS operating system, as is used on the iPad and the iPod touch. It is primarily controlled by a user's fingertips on a multi-touch display.
The iPhone 3GS is preceded by the iPhone 3G and succeeded by the iPhone 4.
for more information visit : iPhone 3GS
iPhone 4:-
For more information visit: iPhone 4
iPhone 4:-
The iPhone 4 is a touchscreen smartphone developed by Apple. It is the fourth generation ofiPhone, 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 strengthenedaluminosilicate glass. It has an Apple A4 processor 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".
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