Two cores in the A5 chip deliver up to two times more power and up to seven times faster graphics.² And you�ll feel the effects. Fast. iPhone 4S is quick and responsive, which makes all the difference when you�re launching apps, browsing the web, gaming, and doing just about everything. And no matter what you�re doing, you can keep on doing it. Because the A5 chip is so power-efficient, iPhone 4S has outstanding battery life.