Apple iphone 4 - In both hardware and software, Apple iphone 4 is a major leap over its already-excellent predecessor, the iPhone 3GS. The combination of gorgeous new hardware, amazing display, upgraded cameras, and major improvements to the operating system make Apple iphone 4 an extremely formidable package. Apple iphone 4 is a GSM cell phone with a high-resolution display, FaceTime video calling, HD video recording, a 5-megapixel camera, and more.