iPhone 4
The iPhone 4 is a smartphone developed by Apple Inc., released in June 2010 as the fourth generation of the iPhone lineup. It features a sleek design with a glass front and back, a stainless steel frame, and a 3.5-inch Retina display, known for its high pixel density that delivers sharp text and images. The iPhone 4 was notable for introducing features such as a front-facing camera for video calling via FaceTime, an improved rear camera capable of recording HD video, and the A4 chip that enhanced performance and battery efficiency. It also marked the debut of Apple's iOS 4 operating system, which introduced multitasking capabilities among other improvements. The iPhone 4 was instrumental in shaping modern smartphone design and functionality.