Why iPhone 4 Is Good? The iPhone 4 is one of an item planned and promoted by Apple Inc. which brings the organization, the clients and the world into another measurement. There have been four ages of iPhone. The absolute first model of the iPhone is called iPhone. The first iPhone was discharged to the market in mid of 2007. The second era is called iPhone 3G (discharged on mid of 2008), pursue by iPhone 3GS (discharged on mid of 2009) and the current iPhone 4 (discharged on mid of 2010).