iPhone:Dual-core A5 chip.

 

The most powerful iPhone ever.

 Two cores in the A5 chip deliver up to two times more power and up to seven times faster graphics. 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.