The iPhone has made Apple the most valuable public company in the world.
It's the most successful product of the new millennium so far, and despite repeated predictions that it may have peaked, it continues to be a major contributor to the Californian company's bottom line.
Alexander Armbruster
Responsible editor for business online.
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Carsten Knop
Editor.
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15 years ago, the then and now deceased Apple CEO Steve Jobs presented this smartphone to the world public.
He himself immediately had high hopes for it - others, including Steve Ballmer, the then Microsoft boss, gave this product only a slim chance.
Why did the iPhone work?
What did his success mean for Apple?
Why did it continue seamlessly under Jobs' successor Tim Cook?
We are talking about an anniversary that is second to none.