OnePlus Concept One was unveiled after a bit of teasing at CES 2020. The first OnePlus concept phone, it has been developed in collaboration with McLaren. The OnePlus Concept One is claimed to be the first smartphone to feature an electrochromic glass panel, which can turn transparent or opaque to reveal or hide the rear cameras. OnePlus claims that it takes just 0.7 seconds to transition from solid black to fully clear, which is quicker than the camera itself takes to fully activate.

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