On January 5, five years ago, the tech genius Steve Jobs revealed the first iPhone, combining a iPod, a phone and an internet mobile communicator into one device and kicked off an new era for the mobile phone industry.

Without doubt, now iPhone has become the most popular handset in the world - just as Jobs predicted. And, even though it is competing with many rivals, especially Android smartphone manufacturers such as Samsung and HTC, Apple is holds the absolute dominant position in the smartphone market, thanks to the latest iPhone 4S. The newest iPhone 4S has now reached more than 90 countries, becoming the hottest iPhone ever.

As iPhone celebrates its 5th birthday, let's go through its amazing journey together even as we wish it a prosperous future. Start the slideshow to check out how iPhone evolved through the years.

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