The
iPhone 4 was a
smartphone designed and marketed by
Apple Inc. 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. It is the
4th generation of iPhone, succeeding the
3GS and preceding the very similar
4S.