• The operating system was revealed in January of 2007 at the Macworld Conference and Expo and released later that year. iPhone OS-1.
  • The iPhone OS 1 operating system was introduced in early 2007 and was released to the public with the first iPhone in late June of that year.
  • iPhoneOS 1.0 (1A543a) for iPhone 2G. This firmware is not signed. This means you cannot restore to it in iTunes.
  • Download iOS 1.0 for iPhone 2G. Download or Copy link below. Device Information.
  • The early versions of iPhone OS 1 were very limited, and subsequent builds such as 1.0.1 and 1.0.2 offered minor tweaks and bug fixes.
  • Apple’s iOS has evolved significantly over the years, from its humble beginnings in iPhone OS 1 to the latest iOS 18.
  • As you can see in the photo above, there aren’t many apps on the iPhone with iPhone OS 1. The apps also look very different than they do now.
  • Development of iPhone OS 1.0 and the first generation of iPhone hardware was a combined effort.
  • iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware.