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Prototype phone designed for drumstick users (“thumb-only mode”)

Product-style photo/illustration of a chunky late-90s Nokia handset prototype with exaggerated usability features: oversized keypad, a labeled “THUMB MODE” toggle or slider, and a rubberized wipeable coating. Show wear: smudges, grease sheen, tiny crumbs in crevices to sell the premise. Neutral studio background like an internal R&D catalog shot.