A patent of a foldable mobile device filed with authorities in South Korea last month gave some clues as to the future of Samsung mobile devices.

But at an analyst day on Wednesday, some investors saw prototypes of a range of foldable mobile devices that Samsung is testing, giving more details on what they would actually do and look like. Reporters were banned from the conference and were not given access to see the prototypes, while the attendees were not permitted to take any photos inside the venue.

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