Apple has started the global rollout of iOS 18, featuring enhanced customization, an upgraded Siri, and a redesigned Photos app. Users can download it via Settings. It supports a range of iPhone models, including the iPhone 16 series, and offers improvements in Messages and Safari. Apple has started the global rollout of iOS 18, featuring enhanced customization, an upgraded Siri, and a redesigned Photos app. Users can download it via Settings. It supports a range of iPhone models, including the iPhone 16 series, and offers improvements in Messages and Safari.