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Microsoft invented the iPhone Duo back in 2009 [Video]

2026-09-10 | original

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Why This Matters

An opinion piece noting that Apple's newly discussed foldable 'iPhone Duo' echoes Microsoft's 2009 Courier dual-screen prototype, right down to dragging content between apps across two panels. It's a reminder that in consumer hardware, execution and hardware-software integration matter more than being first with a concept.

Key Takeaways

Microsoft's 2009 Courier prototype demonstrated dual-screen UI ideas, including cross-screen content dragging, but was cancelled within a year.
The author argues Apple's foldable succeeds because of tight hardware-software integration, not novelty of the form factor.
Microsoft carried some of these ideas into Surface products, yet the piece contends Apple ultimately delivered the vision Microsoft first sketched.

Worth a Look

Microsoft Surface Duo 2 — If the Courier concept fascinates you, the Surface Duo 2 is the closest Microsoft ever came to shipping that dual-screen, book-style vision. Two displays joined by a 360-degree hinge let you run separate apps side by side and drag content between them, which is exactly the interaction the 2009 video teased. It's a genuine piece of foldable-computing history you can still hold in your hands.

See Microsoft Surface Duo 2 on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.

Those with very long memories might have spotted a resemblance between the iPhone Duo and a prototype device seen way back in 2009, the Microsoft Courier.

My headline is, of course, tongue-in-cheek: Microsoft never got any further than the prototype, and abandoned the project less than a year later. All the same, it is remarkable now to look back at it and see just how similar it is in terms of the integrated user-interface …

I said in my earlier piece that Apple has shown the world how to properly make a foldable smartphone, and that the clever integration between hardware and software is absolutely key to this.

One of the examples I gave was dragging part of a photo from one side of the screen to a separate app on the other, so it’s quite amusing to see Microsoft demonstrating a very similar capability in that 2009 concept video.

Microsoft did run with some of this type of capability with some of its Surface products, but it’s ironic that it took Apple to really match the level of integration the company originally had in mind. Check out the video below.

Explore topics: iphone duo microsoft courier apple foldable smartphone microsoft surface