Introduced on September 12, 2017, this iPhone 8 Plus represented a "huge step forward for the iPhone," according to Apple CEO Tim Cook. The overall design is the same as previous-generation devices, but this iPhone 8 Plus adopted glass bodies sandwiched in a matching aluminum frame. This iPhone 8 Plus featured the most durable glass ever in a smartphone in a reinforced steel and aluminum structure that is IP67 water and dust resistant. The stereo speaker setup in the device was updated to be 25 percent louder with deeper bass. This iPhone 8 Plus features a 5.5-inch display. Displays were upgraded with True Tone support, designed to adapt color temperature and intensity to the ambient light in a room for a more natural, paper-like viewing experience. 3D Touch and P3 wide color support for a greater range of colors continue to be available. Inside this iPhone 8 Plus, there's a six-core A11 Bionic chip, which is said to be the smartest, most powerful chip ever introduced in a smartphone. There are two performance cores that are 25 percent faster than the A10 Fusion chip in the iPhone 7, and four efficiency cores that are 70 percent faster.

 With a second-generation performance controller, all six cores can be harnessed at the same time for much improved speeds when handling multi-threaded workloads. There's an Apple-designed 3-core GPU that's 30 percent faster than the previous-generation GPU, and two of the cores, the Neural Engine, make machine learning tasks faster than ever before. It also features improved cameras with better sensors that let 83 percent more light into the wide-angle camera compared to the previous generation. There's also an upgraded image signal processor built into the A11 that brings better low light performance, including faster autofocus, and there are new pixel processing techniques for sharpness pixel texture. In addition, iPhone 8 Plus continues to offer a dual-lens camera setup with both an f/2.8 telephoto lens and a f/1.8 wide-angle lens, both of which have upgraded sensors. Optical image stabilization continues to be available for the iPhone 8 and the wide-angle lens in the iPhone 8 Plus. Apple's Portrait Mode, limited to the iPhone 8 Plus's dual-lens camera system, has been updated with a Portrait Lighting effect to dynamically change the lighting in an image to mimic studio lighting techniques. With the upgraded image signal processor and an Apple-designed video encoder that enables faster video frame rates and real-time image and motion analysis, video capture on the iPhone 8 Plus is better than ever. 4K video at 60 frames per second is supported, as is 1080p slow motion video. The cameras are calibrated for AR, there's an updated gyroscope and accelerometer to enable more accurate motion tracking, and the A11 Bionic offers world tracking and scenes while the GPU renders realistic graphics and the image signal processor offers real-time lighting estimation.