iPhone 4 Survival Guide: Concise Step-by-Step User Manual for iPhone 4: How to Download FREE eBooks, Make Video Calls, Multitask, Make Photos and Videos & More $13.65 NOW INCLUDES iPHONE 4S! The iPhone 4 and 4S introduced many new features not seen in the iPhone 3G and 3GS, such as FaceTime video calling, multitasking, and [...]