The iPhone was first announced by Steve Jobs in January 2007, and was released in June of that year.
The first iPhone was only available on the AT&T network in the United States, and it wasn't released internationally until later that year.
The first iPhone had a 3.5-inch touchscreen display and was powered by a 412 MHz ARM11 processor.
The iPhone did not have an App Store when it was first released, as it only included built-in apps and web apps.
The first iPhone did not have a physical keyboard, it only had a virtual keyboard on the screen.
It was not 3G enabled, it only supported EDGE (2G) data speeds
It was not equipped with a front-facing camera, which would become a standard feature on smartphones in the future
The first iPhone did not have a GPS receiver, which meant that location-based features like Maps required a Wi-Fi connection.
The first iPhone was also not water resistant, and was easily damaged by water.
The iPhone was not initially supported by third-party developers, as Apple did not release a software development kit (SDK) until March 2008.