"The iPhone is a revolutionary and magical product that is literally five years ahead of any other mobile phone," Said Steve Jobs.
Since then, Apple has sold more than 1.2 billion iPhones and has become the most profitable public company in the world.
1. We're always online
The iPhone made mobile web browsing useful for the first time. Every other mobile web browser before that was painful. Soon came a flood of apps, which removed the need to open a web browser at all.
2. The key to apps
Apple's first iPhone didn't have third-party apps or the App Store. That changed in July 2008, when Apple introduced the iPhone 3rd generation and its iPhone 2. software.
The App Store is what made the iPhone a must-have device. There are now more than 2 million apps in the App Store, with essentially every company making one or more apps.
3. Everyone's a photographer
We had cameras on our phones before the iPhone. But the Apple gadget's combination of easy internet access and apps like Instagram inspired people's inner photographer.
As a result, lugging around an actual camera became redundant.
4. Video recording capabilities
The phone's camera also means you have a portable camcorder (remember those?) at your fingertips. And on top of that, the phone's connection lets you broadcast video immediately.
That could mean talking to your family members on the other side of the country or shooting a cat video for YouTube.
5. Maps, maps and more maps
The introduction of mapping on the iPhone meant you no longer had to feel like an embarrassed tourist in a new city, clutching a giant paper map on the street corner.
Google Maps and Apple Maps are two of the most-used apps on the iPhone, and they've steadily added features over the years, like public transit directions.
6. Next generation of mobile gaming
The iPhone reinvented the idea of mobile gaming. Apps like Angry Birds, that anyone could play using their fingers on the touchscreen, became hugely popular, and payment models changed.
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