For past few months, due to speculations and expectations, iPhone 5 is expected to arrive this fall.
Given the popularity of iPhone, the upcoming iPhone is expected to be a major redesign. Not only more powerful, it should be better than iPhone 4S otherwise who would be interested in buying it, given the fact that iPhone 4S was released last October.
Apple is expected to introduce the A6 Central Processing Unit (CPU) in the iPhone 5. Digitimes has reported that the Apple A6 CPU will be built on the Samsung Exynos 4 quad-core processor. Quad-core CPUs are already used in several new smartphones.
It is safe to assume that Apple is going to bring also a quad-core CPU with the iPhone 5.