Compared to the old phone, not much change has been done in this iPhone. Instead, the Apple iPhone 3G was launched incorporating 3G connectivity into the older iPhone itself. In 2009, Apple first introduced its S series. The new iPhone was launched as the Apple iPhone 3GS. The phone was only offered with a 3.5-inch touch screen. For the first time in this phone, the option of copy and paste was also given. The processor of this phone was made faster than both the phones introduced earlier. The company told the S series about speed. In the year 2010, for the first time, the iPhone was launched in Retina display and square shape. The phone was introduced with a metal frame and glass design. The iPhone 4 was the first iPhone device to have a front-facing camera. The phone had iOS 4, which could handle multitasking with ease.