iPhone 15 and iPhone 15 Plus have new hardware upgrades like the A16 Bionic chip and 48MP main camera. Along with new features like Dynamic Island and 5 new colors. For the iPhone 15 Pro series that come with the new A17 Pro chip, customizable Action button, 48MP main camera and 4 new titanium colors. Lastly a major change for all iPhone 15 models is the USB-C port replacing the Lightning one.