The iPhone 6, a redesigned smartphone from Apple, features a larger, thinner design with improved processors, camera quality, and display resolution compared to its predecessors. It offers various specifications, including a 4.7-inch Retina HD display, advanced camera features, and secure fingerprint access through Touch ID. The document also compares the iPhone 6 with competitors like the Samsung Galaxy S5, HTC One, and Sony Xperia Z3, highlighting differences in design, camera capabilities, and pricing.