The iPhone 4 is a smartphone that was designed and marketed by Apple Inc.It is the fourth generation of the iPhone lineup
Succeeding the iPhone 3GS and preceding the 4S.Following a number of notable leaks
The iPhone 4 was first unveiled on June 7
2010
At Apple's Worldwide Developers Conference in San Francisco
And was released on June 24
- 2010
- In the United States
- United Kingdom
- France
- Germany
And Japan.The iPhone 4 introduced a new hardware design to the iPhone family
Which Apple's CEO Steve Jobs touted as the thinnest smartphone in the world at the time; it consisted of a stainless steel frame which doubled as an antenna
With internal components situated between two panels of aluminosilicate glass.The iPhone 4 introduced Apple's new high-resolution Retina Display
While maintaining the same physical size and aspect ratio as its precursors
Apple's A4 system-on-chip
Along with iOS 4—which notably introduced multitasking functionality and app folders.It was the first iPhone at the time to include
A front-facing camera
Which made possible Apple's new FaceTime video chat service
And the first to be released in a version for CDMA networks
Ending AT&T's period as the exclusive carrier of iPhone products in the United States.