At Mobile World Congress in February, Motorola showed off its rollable concept phone, which was the first time the public got to see a working version of the next kind of flexible display for consumer phones. Recently, at a briefing in Chicago, the company gave me hands-on time with the rollable prototype — nicknamed Rizr, which like the new foldable Razr, is a throwback to a mid-2000s series of phones with ‘rising’ faceplates — and I chatted with one
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