There are a lot of weird phones out there, but I've never seen one quite like this before. Oppo's new concept phone, the Oppo X 2021, might at first appear to be a standard 2020 phone with a 6.7" display. One quick swipe on the side, however, and the screen expands to a more tablet-like 7.4" size. Magic? Almost — it's thanks to a flexible screen and a motorized scroll mechanism.
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