Chinese tat bazaar Xiaomi has emitted another teaser video for its foldable phone, confirming that vendors are taking different design approaches to the challenge.

Samsung's Galaxy Fold is an "innie" design – with the main display closing like a book cover.

And Xiaomi's is a trifold design – bending in two places.

Samsung added a 4.6-inch "cover display" to complement the 7.3-inch main panel.

Huawei simply made its 8-inch panel serve as a cover display when closed.

And it obviously replicates the design flaw of the Huawei, as the screen wraps around the outside when you close it, making it vulnerable to dings and dents and scratches.

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