Apple founder Steve Jobs introduced the iPhone to the world on this day in 2007.

The mobile market has evolved past the point of simple flip phones dramatically in the past 10 years. That is due to the emergence of the smartphone and more specifically, the iPhone. On this day in 2007, the iPhone was introduced to the world by Apple founder, Steve Jobs. At the Macworld expo in 2007 held at the Moscone Center in San Francisco, there were two initial models announced – the 4GB and the 8GB versions. At that time, the phones cost $499 and $599 respectively and required a 2-year contract through the exclusive carrier AT&T. The phone officially went on sale in June of that year. The first generation phone had quite a bit of a different body style than the phones we now know. The back was a solid piece of aluminum with a black plastic accent. Apple sold 6.1 million first-generation iPhone units over five quarters and today, Apple has sold over 1 billion units of the smartphone.

Apple commemorated the occasion by creating a special anniversary page on apple.com.

On it, Apple CEO Tim Cook paid special tribute to the flagship device by saying –

“iPhone is an essential part of our customers’ lives, and today more than ever it is redefining the way we communicate, entertain, work and live. iPhone set the standard for mobile computing in its first decade and we are just getting started. The best is yet to come.”

As of late 2015, the iPhone is reported to have 43.6% of the mobile phone market share followed by Samsung, LG, and Motorola.