The iPhone at 15: How Apple's iconic smartphone changed the world forever and how it's evolved since 2007

The technology world changed fifteen years ago.

Steve Jobs called the original iPhone "an iPod, a phone, and an internet communication device" when it was unveiled in 2007. Even though Jobs knew that the iPhone would change the way we communicate and access the internet, he could not have predicted how much it would change.

The era in which pocket-sized computers that can answer any question with the push of a button became the norm was ushered in by the first iPhones. There are more than 5 billion people who use mobile services. Insider Intelligence data shows that people in the US spend four hours a day on their phones.

It's possible to do everything from the way we work, communicate, shop, travel, manage our finances, and experience entertainment through a mobile device.

Here's a look at how the phone has changed over time.

Associated Press

Since its launch in 2007, the iPhone has had a number of redesigns. It had a thinner profile and sharper shape compared to its predecessors, and was made of glass with a metal trim around its edges.

The Retina display, which has become a hallmark of Apple's products, was introduced in the 4th iteration of the device.

The call reception issue that became known as "Antennagate" was one of the reasons why the iPhone 4 was criticized. Consumer Reports did not recommend the iPhone 4 in 2010 due to issues with the antenna, but some owners did.

Steve Kovach/Business Insider

The iPhone 5C was a cheaper alternative to the flagship iPhone 5S. It was $100 cheaper than the 5S model because it came in an array of bold colors.

The plastic body of the iPhone 5C was better than the aluminum one of the iPhone 5S. It was significant because it was the first time that Apple gave shoppers a cheaper alternative to choose from, potentially setting a precedent for future devices.

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