IPhone OS 1.0 build 1A543a

iPhone OS 1.0 Build 1A543a is a build of iPhone OS 1.0. As of 2020 this build is the second confirmed and leaked build of iPhone OS 1.0.

Features

 * Make and receive Phone calls and Messages
 * Watch YouTube videos
 * Take and view photos

Programs Installed

 * Text (later renamed to Messages)
 * Calendar
 * Photos
 * Camera
 * YouTube
 * Stocks
 * Maps
 * Weather
 * Clock
 * Calculator
 * Notes
 * Settings
 * Phone
 * Mail
 * Safari
 * iPod